A method and system for obtaining a dye formula for fabric color

Abstract

The present invention discloses a method and a system for obtaining a dye formula for fabric colors, which relate to the field of dye formula selection. The method includes: determining a variety of fabric colors, generating a color database based on the dye formula information and color characteristic value information of each fabric color, and making a physical color card; obtaining a test color sample, and obtaining a first screened color reference sample according to the color characteristic value information of the test color sample and the total tolerance between the fabric color and the test color sample; visually evaluating the physical color card corresponding to each first screened color reference sample and the test color sample, screening out the physical color card with the color closest to the test color sample, and determining a second screened color reference sample; taking the lowest cost of dyeing chemicals and the best color fastness as the criteria, and determining the best dye formula corresponding to the test color sample from the second color reference samples. The present invention can find the best dye formula with the lowest dyeing cost consumption and the highest color fastness indexes with high efficiency in the shortest time.

Description

Technical Field

[0001] The present invention relates to the field of obtaining dye formulations, and particularly to a method and system for obtaining a dye formulation for the color of a fabric. Background Art

[0002] The current biggest problems restricting textile fabrics are the color stability and cost consumption. The dye selection and dyeing problems are important factors causing these problems. Before mass production on large machines for each color, pre-dyeing sample making is required to determine the color matching method, the accuracy of the first-batch dye prescription, the feasibility of dyeing process parameters, the budget of dyeing chemicals cost, and whether the ultimate fastness index of the fabric is met. Currently, the repetitive nature of pre-dyeing sample making, the long production cycle of products, and the uncontrollability of dye cost and dyeing quality result in a waste of a large amount of manpower, material resources, and financial resources due to the lack of a complete color system as a reference basis. Summary of the Invention

[0003] The purpose of the present invention is to provide a method and system for obtaining a dye formulation for the color of a fabric, which can obtain the best dye formulation for the color of the fabric to be tested with high efficiency and low consumption.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] A method for obtaining a dye formulation for the color of a fabric, the method comprising:

[0006] Determine m color systems, and generate n color information for each of the color systems. All the color information corresponding to all the color systems constitutes m * n fabric colors;

[0007] Generate a color database according to the dye formulation information and the color characteristic L*a*b* value information of each of the fabric colors, and make a physical color card for each of the fabric colors; each of the fabric colors corresponds to multiple pieces of the dye formulation information;

[0008] Obtain a sample of the color to be tested, and obtain the first screening color reference sample based on the color characteristic L*a*b* value information of the sample of the color to be tested and the total tolerance between the fabric color and the sample of the color to be tested;

[0009] Visually evaluate the physical color card corresponding to each of the first screening color reference samples and the sample of the color to be tested, screen out the physical color card with the color closest to the sample of the color to be tested, record it as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second screening color reference sample;

[0010] Taking the lowest cost of dyes and chemicals and the best light fastness and wash and rub fastness as the criteria, the best dye formulation corresponding to the color sample to be measured is determined from all the dye formulation information corresponding to the second color reference samples.

[0011] Optionally, before generating the color database based on the dye formulation information and the color characteristic L*a*b* value information of each fabric color, it further includes: numbering each fabric color, and each fabric color number includes the overall color system hue value, the specific hue value, the color lightness depth value, and the color chroma intensity value.

[0012] Optionally, obtaining the first screened color reference samples based on the color characteristic L*a*b* value information of the color sample to be measured and the total tolerance between the fabric color and the color sample to be measured specifically includes:

[0013] Determining the color characteristic value comparison range according to the color characteristic L*a*b* value information of the color sample to be measured; the color characteristic value comparison range includes the comparison range of the color characteristic L* value, the comparison range of the color characteristic a* value, and the comparison range of the color characteristic b* value;

[0014] Selecting the fabric colors with color characteristic L*a*b* values within the color characteristic value comparison range from the color database, and recording them as the target color reference samples;

[0015] Calculating the total tolerance between each target color reference sample and the color sample to be measured, and screening out all the target color reference samples with the total tolerance less than the preset value, which are the first screened color reference samples.

[0016] Optionally, the selecting the fabric colors with color characteristic L*a*b* values within the color characteristic value comparison range from the color database specifically includes:

[0017] In the color database, screening out the fabric colors with the color characteristic L* value within the comparison range of the color characteristic L* value, the color characteristic a* value within the comparison range of the color characteristic a* value, and the color characteristic b* value within the comparison range of the color characteristic b* value.

[0018] Optionally, the calculating the total tolerance between each target color reference sample and the color sample to be measured specifically includes:

[0019] Calculating the brightness difference, saturation difference, and hue difference between each target color reference sample and the color sample to be measured;

[0020] Calculating the total tolerance according to the brightness difference, the saturation difference, and the hue difference.

[0021] Optionally, one of the fabric colors includes i ways of color selection and matching; each way of color selection and matching corresponds to only one color mixing formula; each color mixing formula is composed of j colors mixed; each of the colors corresponds to h dyeing prescriptions; each dyeing prescription corresponds to information on a dyeing process, dyeing chemical cost, light fastness to sunlight, and color fastness to dry and wet rubbing; each fabric color corresponds to j×h kinds of dye formula information.

[0022] The present invention also provides a dye formula acquisition system for fabric colors, the system comprising:

[0023] A fabric color determination module, configured to determine m color systems, and generate n color information for each of the color systems, and all the color information corresponding to all the color systems constitutes m*n kinds of fabric colors;

[0024] A color database and physical color card construction module, configured to generate a color database according to the dye formula information and color feature L*a*b* value information of each fabric color, and make a physical color card for each fabric color; each fabric color corresponds to multiple kinds of dye formula information;

[0025] A first screening module, configured to obtain a test color sample, and obtain a first screening color reference sample based on the color feature L*a*b* value information of the test color sample and the total tolerance between the fabric color and the test color sample;

[0026] A second screening module, configured to visually evaluate the physical color card corresponding to each first screening color reference sample and the test color sample, screen out the physical color card with the color closest to the test color sample, denoted as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second screening color reference sample;

[0027] An optimal dye formula determination module, configured to determine the optimal dye formula corresponding to the test color sample from the dye formula information corresponding to all the second color reference samples with the lowest dyeing chemical cost, the best light fastness to sunlight, and the best color fastness to dry and wet rubbing as the criteria.

[0028] Optionally, the first screening module specifically includes:

[0029] A comparison interval determination unit, configured to determine a color feature value comparison interval based on the color feature L*a*b* value information of the test color sample; the color feature value comparison interval includes a comparison interval of the color feature L* value, a comparison interval of the color feature a* value, and a comparison interval of the color feature b* value;

[0030] An interval screening unit for selecting fabric colors with L*a*b* values of color features within the color feature value comparison interval from the color database, denoted as target color reference samples;

[0031] A total tolerance calculation and screening unit for calculating the total tolerance between each target color reference sample and the color sample to be tested, and screening out all target color reference samples with a total tolerance less than a preset value, which are the first-screened color reference samples.

[0032] Optionally, the interval screening unit specifically includes:

[0033] An interval screening subunit for screening out fabric colors in the color database with L* values of color features within the comparison interval of L* values of color features, a* values of color features within the comparison interval of a* values of color features, and b* values of color features within the comparison interval of b* values of color features.

[0034] Optionally, the total tolerance calculation and screening unit specifically includes:

[0035] A total tolerance calculation subunit for calculating the brightness difference, saturation difference, and hue difference between each target color reference sample and the color sample to be tested; calculating the total tolerance based on the brightness difference, the saturation difference, and the hue difference.

[0036] According to the specific embodiments provided by the present invention, the following technical effects are disclosed by the present invention:

[0037] The present invention discloses a method and system for obtaining a dye formula for fabric colors. The method includes: determining a variety of fabric colors, generating a color database and making physical color cards according to the dye formula information and color feature value information of each fabric color; obtaining a color sample to be tested, and obtaining the first-screened color reference samples based on the color feature value information of the color sample to be tested and the total tolerance between the fabric color and the color sample to be tested; visually evaluating each physical color card corresponding to the first-screened color reference samples and the color sample to be tested, screening out the physical color card with the closest color to the color sample to be tested and determining the second-screened color reference samples; determining the best dye formula corresponding to the color sample to be tested from the second color reference samples with the lowest dyeing chemical cost and the best color fastness as the criteria. The present invention can find the best dye formula with the lowest dyeing cost consumption and the highest color fastness indexes in the shortest time and with high efficiency. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 Flowchart of a method for obtaining a dye formulation for fabric color provided in Embodiment 1 of the present invention;

[0040] Figure 2 Principle diagram of a method for obtaining a dye formulation for fabric color provided in Embodiment 1 of the present invention;

[0041] Figure 3 Schematic diagram of a physical color card provided in Embodiment 1 of the present invention. Detailed implementation manners

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] The object of the present invention is to provide a method and system for obtaining a dye formulation for fabric color, which solves the cumbersome and repetitive work processes and technical pain points, and can efficiently find the best dye formulation with the lowest dyeing cost consumption and the highest fastness indexes in the shortest time. It provides a strong innovative basis for shortening the product production cycle, stabilizing quality, reducing production costs, and reducing the repetitive work of pre-dyeing sample making.

[0044] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0045] As Figure 1 and 2 shown, this embodiment provides a method for obtaining a dye formulation for fabric color, and the method includes:

[0046] S1: Determine m color systems, and generate n color information for each of the color systems. All the color information corresponding to all the color systems constitutes m * n fabric colors.

[0047] For example, according to the color system of 1 gray, 2 beige, 3 yellow, 4 coffee, 5 red, 6 green, 7 blue, and 8 camel (m = 8), it is preferred to produce 640 colors (m × n kinds) of blended fabrics with high efficiency, low consumption, excellent quality, low price, and fashionable style through the process of dyeing - color matching - color mixing - drawing - spinning - weaving - finishing - finished products on large machines. Each color system has 80 colors (n = 80). The color information includes dye information and color characteristic information. The 640 fabrics are based on the enterprise's internal control standards and are evaluated by the criteria of high efficiency, low consumption, high market reorder rate, and fashionable style.

[0048] Before performing step S2, each fabric color is numbered first. Each fabric color number includes the overall color system hue value, specific hue value, color lightness depth value, and color chroma intensity value.

[0049] The purpose of numbering the fabric colors is to facilitate color management. The order of the numbers in the number indicates the color system, specific hue, lightness, and chroma of the color.

[0050] Color numbering: The first digit represents the overall color system hue, the second digit represents the specific hue, the third digit represents the lightness depth, and the 4th letter represents the color chroma intensity.

[0051] When numbering all fabric colors, it is required that the overall color system hue value, specific hue value, color lightness depth value, and color chroma intensity value are numbered one by one in ascending order of numerical value. For example, first number all the overall hue values of the fabric colors in ascending order, and then number all the specific hue values of the fabric colors in ascending order, and so on, for the color lightness depth value and color chroma intensity value.

[0052] S2: Generate a color database based on the dye formula information and color characteristic L*a*b* value information of each fabric color, and make a physical color card for each fabric color.

[0053] For each fabric color, summarize multiple groups of dye - related information (dye formula information) from dyeing - color matching - color mixing on large machines.

[0054] Corresponding to the number, test the tristimulus values X, Y, Z of each fabric color, calculate its color characteristic L*a*b* value (the lightness value L*, red - blue value a*, yellow - green value b* of the color), and obtain the color characteristic value information.

[0055] Input the dye information and color characteristic L*a*b* value information of each fabric color into the computer to establish a color database (color management system).

[0056] For example, make physical color cards for 640 fabrics. Each fabric color corresponds to a color card and a color number. Combine the color management system to establish a complete color system from the physical color sample to the dye information and color characteristic information.

[0057] Each of the fabric colors corresponds to multiple dye formula information. One fabric color includes i ways of color selection and matching; each way of color selection and matching corresponds to only one color mixing formula; each color mixing formula is composed of j colors mixed; each of the colors corresponds to h dyeing prescriptions; each dyeing prescription corresponds to information on a dyeing process, dye chemical cost, light fastness to sunlight, and color fastness to dry and wet rubbing; each fabric color corresponds to j×h kinds of dye formula information.

[0058] As Figure 3 shown, the physical color card of the color has the characteristics of a width of 15 cm * a length of 21 cm * a thickness of 1 mm, and each color fabric has the characteristics of a 10 cm * 10 cm square. To make the fabric flat and beautiful, the four sides of the fabric are fixed with masking tape and cut into a 10 cm * 10 cm square with a lace scissors, and then pasted 6 cm below the upper edge of the color card. A space with a length of 15 cm and a width of 6 cm is reserved at the upper edge of the color card to mark the color system category, number, blend content, yarn count, and production time of the fabric color.

[0059] S3: Obtain a test color sample, and based on the color characteristic L*a*b* value information of the test color sample and the total tolerance between the fabric color and the test color sample, obtain the first screened color reference sample.

[0060] Among them, step S3 specifically includes:

[0061] S31: Determine a color characteristic value comparison interval based on the color characteristic L*a*b* value information of the test color sample; the color characteristic value comparison interval includes a comparison interval of the color characteristic L* value, a comparison interval of the color characteristic a* value, and a comparison interval of the color characteristic b* value.

[0062] First, set the minimum comparison intervals for the L*, a*, and b* values respectively. Specifically, assume that for the test color sample, L* = L0, a* = a0, and b* = b0; the minimum interval for L* is [0.95L0, 1.05L0], the minimum interval for a* is [0.95a0, 1.05a0], and the minimum interval for b* is [0.95b0, 1.05b0].

[0063] S32: Select the fabric colors whose color characteristic L*a*b* values are within the color characteristic value comparison interval from the color database, and record them as the target color reference samples.

[0064] Those with color L*a*b* values within the interval can all be used as reference information for the color samples to be measured. The minimum interval values of the brightness difference ΔL between the color samples to be measured and the numbered fabric color samples are [-0.05, +0.05], the minimum interval values of the saturation difference ΔC are [-0.225, +0.2255], and the minimum interval values of the hue difference ΔH are [-0.17, +0.17]. All numbered color samples with a total tolerance DE value ≤ 0.2 can be used as the first screening color reference samples for the color samples to be measured.

[0065] Among them, step S32 specifically includes:

[0066] In the color database, fabric colors are screened out whose color feature L* values are within the comparison interval of the color feature L* values, color feature a* values are within the comparison interval of the color feature a* values, and color feature b* values are within the comparison interval of the color feature b* values.

[0067] S33: Calculate the total tolerance between each of the target color reference samples and the color sample to be measured, and screen out all the target color reference samples with the total tolerance less than the preset value, which are the first screening color reference samples.

[0068] Among them, calculating the total tolerance in step S33 specifically includes:

[0069] Calculate the brightness difference, saturation difference, and hue difference between each of the target color reference samples and the color sample to be measured; calculate the total tolerance according to the brightness difference, the saturation difference, and the hue difference.

[0070] The tolerance DE = {ΔL / (I×S L )] 2 +[ΔC / (C×S C )] 2 +(ΔH / S H ) 2} 1 / 2 , where in the color difference calculation formula, ΔL, ΔC, and ΔH are the brightness difference, saturation difference, and hue difference between the standard sample and the sample obtained by the CIELAB color difference formula. I and C in the formula are two coefficients for adjusting the relative wide tolerance of lightness and saturation; S L is the lightness weight factor; S C is the chroma weight factor; S H is the hue weight factor.

[0071] When screening the first color reference samples according to the total tolerance, it can also be determined by the color difference rating between the fabric color and the color sample to be measured. The color difference rating is evaluated according to the CMC total color difference DE value and the corresponding level comparison table, as shown in Table 1.

[0072] Table 1: 1CMC(1:1) Relationship between the total color difference DE value of the color difference type and the color difference rating

[0073]

[0074] When the DE value ≤ 0.2, the color difference between the first-screened color reference sample and the sample to be tested is Grade 5. Therefore, the fabric color with a color difference of Grade 5 from the sample to be tested can also be used as the first-screened color reference sample. The results of the first-screened color reference samples determined by the color difference rating and the total tolerance are the same, just two different expressions.

[0075] S4: Visually evaluate the physical color card corresponding to each of the first-screened color reference samples and the sample to be tested color, select the physical color card with the color closest to the sample to be tested color, record it as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second-screened color reference sample.

[0076] Perform a second visual evaluation on all the first-screened color reference samples with a color difference of Grade 5 from the sample to be tested color in sequence according to the color numbers and the sample to be tested color.

[0077] The visual evaluation criteria are: light source standard, environmental standard, observer standard, and observed object standard.

[0078] The light source standard is: D65 light source with a color temperature of 6500K + 200k.

[0079] The environmental standard is: The color of the observation table and the light source environment should be Munsell N6-N7 neutral gray, and the inclination angle between the observation table and the light source platform is 45°.

[0080] The observed object standard is: The observation table is placed in the middle of the light source, and all the first-screened color reference samples must be placed closely in partial superposition in the same direction on the observation table, and the sample to be tested color is placed on the observation table for dynamic comparison.

[0081] The observer standard is: having certain experience and technology, being sensitive to colors, and the observer needs to conduct visual evaluation dynamically from multiple angles to preferably select the physical fabric (physical color card) with the color closest to the sample to be tested.

[0082] S5: Based on the criteria of the lowest dyeing and chemical cost, the best light fastness, and the best wet and dry rubbing fastness, determine the best dye formula corresponding to the sample to be tested color from all the dye formula information corresponding to the second color reference samples.

[0083] In this embodiment, a method for establishing a color system with high efficiency and low consumption and optimizing dyes is disclosed. It relates to the technical field of a fabric color system with high efficiency, speed, and low consumption, and a technique for optimizing the dyeing performance of dyes according to the establishment of the color system. It can match the color selection method with high efficiency in the shortest time, and obtain the best dye formula with the lowest dye cost consumption and the highest fastness indexes. It can shorten the product production cycle, stabilize the quality, reduce the production cost, and reduce the repetition of the pre-dyeing sample-making work.

[0084] The following are several examples of applying the method of this embodiment:

[0085] Example 1: Order from Warm Doctor New Materials: Blended content 60% cotton / 40% lyocell, yarn count: 32Ne, order quantity 10,000 meters, overall color system: red system, specific color hue: light red-orange, requiring a light fastness of 5 levels. Measure the tristimulus values X, Y, Z of the customer's color sample, calculate L* = 54.62, a* = 39.25, b* = 6.84, set the minimum interval of L* as [51.89, 57.35], the minimum interval of a* as [37.28, 41.21], and the minimum interval of b* as [6.50, 7.18]. The color numbers with L*a*b* values within the interval in the color management system (color database) are 5322, 5331, 5324, 5330, 5321. These 5 colors can all be used as reference information for the color to be tested. According to the minimum interval of the brightness difference ΔL [-0.05, +0.05], saturation difference ΔC [-0.225, +0.225], and hue difference ΔH [-0.17, +0.17] between the sample to be tested and the numbered color samples, and the total tolerance DE value ≤ 0.2, there are two remaining numbered colors, 5322 and 5321. Both can be used as the first reference sample for the color to be tested (the first screening color reference sample). Combining the comparison with the physical color card samples, the color sample numbered 5322 is determined as the best color reference sample.

[0086] Click on the number 5322 in the color information database, and the corresponding color selection and matching information will be randomly retrieved:

[0087] Original white cotton yellow cotton red lyocell 30% 20% 40%

[0088] There are multiple dye compatibility choices for the dyeing prescriptions of the selected color fibers. Optimize the dyes according to the order requirements.

[0089] There are two dye prescription selection information for red lyocell:

[0090]

[0091] Colorfastness to rubbing: According to GBT 3920-2008 "Textiles - Tests for colorfastness - Colorfastness to rubbing".

[0092] Light fastness; in accordance with GB / T 8427-2019 "Textiles - Colorfastness to artificial light: Xenon arc".

[0093] For red Lyocell, the reactive dye formulation information 1 is optimized according to the dyeing chemical cost and light fastness requirements. The large-scale production dyeing process data information is as follows:

[0094] Pretreatment: Add 3 g / L of sodium carbonate (Na2CO3) at 30 °C, heat up to 70 °C, run for 10 min, then heat up to 98 °C at a heating rate of 1 °C / min, keep warm for 40 min, and cool down to 30 °C for emptying and rinsing.

[0095] Dyeing process: Add 15 g / L of sodium sulfate (Na2SO4) and 1 g / L of sodium carbonate (Na2CO3) to auxiliary vat 1, run for 30 min and then discharge into the main vat. Add the dye to auxiliary vat 2, run for 30 min and discharge into the main vat. Heat up to 80 °C at a heating rate of 0.5 °C / min, keep warm for 20 min, then add an additional 5 g / L of sodium carbonate (Na2CO3) and keep warm for another 30 min, and then cool down, empty, and rinse until the temperature reaches 50 °C.

[0096] Post-treatment and fixation: Add 1 g / L of detergent Yiweijie R to the auxiliary vat, run for 30 min and then discharge into the main vat. Heat up to 60 °C, run for 15 min, then empty, rinse, and take out of the vat.

[0097] There are two types of dye formulation selection information for yellow cotton:

[0098]

[0099] For yellow cotton, the reactive dye formulation 1 is optimized according to the dyeing chemical cost information and light fastness requirements. Its dyeing process information is the same as that of red Lyocell.

[0100] Colorfastness to rubbing: in accordance with GBT 3920-2008 "Textiles - Colorfastness to rubbing".

[0101] Light fastness: in accordance with GB / T 8427-2019 "Textiles - Colorfastness to artificial light: Xenon arc".

[0102] Case 2: Jiangsu Pinchuang Order: Blended content, 20% sea wool, 30% cotton, 50% lyocell, yarn count: 32Ne, order quantity: 10,000 meters, overall color system: green, specific color hue: dark blue - green, requiring wet rubbing fastness to reach level 4. Test the tristimulus values X, Y, Z of the customer's color sample, calculate L* = 19.55, a* = -23.53, b* = -38.25, set the minimum interval of L* as [18.57, 20.52], the minimum interval of a* as [-24.70, -22.35], the minimum interval of b* as [-40.16, -36.33]. In the color management system, the color numbers within the interval of L*a*b* values are 6763, 6761, 6765, 6764, a total of 4, all of which can be used as reference information for the color to be tested. According to the minimum interval of brightness difference ΔL [-0.05, +0.05], saturation difference ΔC [-0.225, +0.225], and hue difference ΔH [-0.17, +0.17] between the sample to be tested and the numbered color samples, and the total tolerance DE value ≤ 0.2, the remaining two numbered colors are 6763 and 6764. Both can be used as the first reference sample for the color to be tested. Combining with the comparison of the physical color card samples, the color sample numbered 6764 is designated as the best color reference sample.

[0103] Click on the number 67647 in the color information library, and the corresponding color matching information can be randomly retrieved:

[0104] Original white Lyocell Green Cotton Green Sea wool 50% 30% % 20%

[0105] There are multiple dye compatibility choices for the dyeing prescriptions of the selected color - matching fibers. Optimize the dyes according to the order requirements. There are two choices for the dyeing prescription selection information of green sea wool:

[0106]

[0107] Color fastness to rubbing: According to GBT3920 - 2008 "Textiles - Tests for color fastness - Color fastness to rubbing".

[0108] Color fastness to light: According to GB / T8427 - 2019 "Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc".

[0109] For green sea wool, according to the cost information of dyes and chemicals and the requirements of color fastness to rubbing, optimize the reactive dye prescription information 1, and its large - scale dyeing process data information is:

[0110] Dyeing process: Initially at 30°C, add 1% acetic acid (HAC), 1% formic acid (HCOOH), 0.5% antifoaming agent (FFA), and 2% leveling agent Albegal B to auxiliary cylinder 1 and run for 30 minutes, then discharge into the main cylinder. Add dyes to auxiliary cylinder 2 and run for 30 minutes, then discharge into the main cylinder. Heat up to 70°C at a heating rate of 0.8°C / min, run for 10 minutes, then heat up to 98°C at a heating rate of 0.8°C / min, keep warm for 50 minutes, and then cool down, empty, and rinse until clean to 30°C.

[0111] Post-treatment: Add 5 g / L sodium carbonate (Na2CO3) to the auxiliary cylinder, run for 30 minutes, then discharge into the main cylinder. Heat up to 80°C at a heating rate of 0.5°C / min, keep warm for 20 minutes, then cool down, empty, and rinse until clean, and then heat up to 50°C. Add 1% formic acid (HCOOH) to the auxiliary cylinder, run for 30 minutes, then discharge into the main cylinder. Run the main cylinder for 10 minutes, then empty, rinse until clean, and discharge from the cylinder.

[0112] There are two pieces of information on the selection of dye recipes for green cotton:

[0113]

[0114] The dry and wet rubbing fastness of the two groups of dye recipe information for green cotton are the same, but according to the cost information of dyes and chemicals, dye recipe information 1 is preferably selected. The large vat dyeing process information is the same as that of the yellow cotton in Example 1.

[0115] In summary, by using the method for establishing a color system and selecting dyes with high efficiency and low consumption provided by the present invention, the color formula can be quickly found, the proofing time can be shortened, the product production cycle can be shortened, the cost of dyes and chemicals can be saved, the dyeing process can be stabilized, and the fastness index can be improved.

[0116] Example 2

[0117] The present invention provides a system for obtaining a dye formula for fabric colors, and the system includes:

[0118] Fabric color determination module T1, which is used to determine m color systems, and generate n color information for each of the color systems. All the color information corresponding to all the color systems constitutes m*n kinds of fabric colors.

[0119] Color database and physical color card construction module T2, which is used to generate a color database according to the dye formula information and the color characteristic L*a*b* value information of each fabric color, and make a physical color card for each fabric color; each fabric color corresponds to multiple pieces of the dye formula information.

[0120] The first screening module T3 is used to obtain the color sample to be measured, and based on the color characteristic L*a*b* value information of the color sample to be measured and the total tolerance between the fabric color and the color sample to be measured, obtain the first screening color reference sample.

[0121] The second screening module T4 is used to visually evaluate the physical color card corresponding to each of the first screening color reference samples and the color sample to be measured, screen out the physical color card with the color closest to the color sample to be measured, denoted as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second screening color reference sample.

[0122] The optimal dye formulation determination module T5 is used to determine the optimal dye formulation corresponding to the color sample to be measured from the dye formulation information corresponding to all the second color reference samples with the criteria of the lowest cost of dye chemicals, the best light fastness and the best wet and dry rubbing fastness.

[0123] The first screening module T3 specifically includes:

[0124] The comparison interval determination unit T31 is used to determine the color characteristic value comparison interval based on the color characteristic L*a*b* value information of the color sample to be measured; the color characteristic value comparison interval includes the comparison interval of the color characteristic L* value, the comparison interval of the color characteristic a* value, and the comparison interval of the color characteristic b* value.

[0125] The interval screening unit T32 is used to select the fabric colors with the color characteristic L*a*b* values within the color characteristic value comparison interval from the color database, denoted as the target color reference samples.

[0126] The interval screening unit T32 specifically includes:

[0127] The interval screening subunit is used to screen out the fabric colors in the color database with the color characteristic L* value within the comparison interval of the color characteristic L* value, the color characteristic a* value within the comparison interval of the color characteristic a* value, and the color characteristic b* value within the comparison interval of the color characteristic b* value.

[0128] The total tolerance calculation and screening unit T33 is used to calculate the total tolerance between each of the target color reference samples and the color sample to be measured, and screen out all the target color reference samples with the total tolerance less than the preset value, which are the first screening color reference samples.

[0129] The total tolerance calculation and screening unit T33 specifically includes:

[0130] The total tolerance calculation sub-unit is configured to calculate the brightness difference, saturation difference, and hue difference between each of the target color reference samples and the color sample to be measured; and calculate the total tolerance according to the brightness difference, the saturation difference, and the hue difference.

[0131] Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0132] In this article, specific examples are used to illustrate the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for obtaining a dye formula for fabric color, characterized in that, The method includes: Determine m color systems, and generate n color information for each of the color systems. All the color information corresponding to all the color systems constitutes m*n fabric colors; Generate a color database according to the dye formula information and the color characteristic L*a*b* value information of each fabric color, and make a physical color card for each fabric color; each fabric color corresponds to multiple dye formula information; Obtain a color sample to be measured, and obtain a first-screened color reference sample based on the color characteristic L*a*b* value information of the color sample to be measured and the total tolerance between the fabric color and the color sample to be measured; Visually evaluate the physical color card corresponding to each first-screened color reference sample and the color sample to be measured, select the physical color card with the color closest to the color sample to be measured, record it as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second-screened color reference sample; Determine the best dye formula corresponding to the color sample to be measured from the dye formula information corresponding to all the second color reference samples with the lowest dyeing and chemical cost, the best light fastness, and the best wet and dry rubbing fastness as the criteria.

2. The method according to claim 1, characterized in that, Before generating the color database according to the dye formula information and the color characteristic L*a*b* value information of each fabric color, it further includes: numbering each fabric color, and each fabric color number includes the overall color system hue value, the specific hue value, the color lightness depth value, and the color chroma intensity value.

3. The method according to claim 1, characterized in that The step of obtaining the first-screened color reference sample based on the color characteristic L*a*b* value information of the color sample to be measured and the total tolerance between the fabric color and the color sample to be measured specifically includes: Determine a color characteristic value comparison range based on the color characteristic L*a*b* value information of the color sample to be measured; the color characteristic value comparison range includes a comparison range of the color characteristic L* value, a comparison range of the color characteristic a* value, and a comparison range of the color characteristic b* value; Select fabric colors with color characteristic L*a*b* values within the color characteristic value comparison range from the color database, and record them as target color reference samples; Calculate the total tolerance between each target color reference sample and the color sample to be measured, and screen out all the target color reference samples with the total tolerance less than a preset value, which are the first-screened color reference samples.

4. The method according to claim 3, characterized in that The step of selecting fabric colors with color characteristic L*a*b* values within the color characteristic value comparison range from the color database specifically includes: In the color database, screen out fabric colors with the color characteristic L* value within the comparison range of the color characteristic L* value, the color characteristic a* value within the comparison range of the color characteristic a* value, and the color characteristic b* value within the comparison range of the color characteristic b* value.

5. The method according to claim 3, wherein The step of calculating the total tolerance between each target color reference sample and the color sample to be measured specifically includes: Calculate the brightness difference, saturation difference, and hue difference between each target color reference sample and the color sample to be measured; Calculate the total tolerance according to the luminance difference, the saturation difference, and the hue difference.

6. The method according to claim 1, characterized in that One of the fabric colors includes i ways of color selection and matching; each way of color selection and matching corresponds to only one color mixing formula; each color mixing formula is composed of j colors mixed; each of the colors corresponds to h dyeing prescriptions; each dyeing prescription corresponds to information on a dyeing process, dyestuff cost, light fastness, and wet and dry rubbing fastness. Each fabric color corresponds to j×h kinds of the dye formula information.

7. A dye formula acquisition system for fabric colors, characterized in that, The system includes: A fabric color determination module, configured to determine m color systems and generate n color information for each color system. All the color information corresponding to all the color systems constitutes m*n fabric colors. A color database and physical color card construction module, configured to generate a color database according to the dye formula information and the color feature L*a*b* value information of each fabric color, and make a physical color card for each fabric color. Each fabric color corresponds to multiple dye formula information. A first screening module, configured to obtain a color sample to be measured, and obtain a first screening color reference sample according to the color feature L*a*b* value information of the color sample to be measured and the total tolerance between the fabric color and the color sample to be measured. A second screening module, configured to visually evaluate the physical color card corresponding to each first screening color reference sample and the color sample to be measured, screen out the physical color card with the color closest to the color sample to be measured, denoted as the target physical color card, and determine the fabric color corresponding to the target physical color card as the second screening color reference sample. An optimal dye formula determination module, configured to determine the optimal dye formula corresponding to the color sample to be measured from the dye formula information corresponding to all the second color reference samples with the lowest dyestuff cost, the best light fastness, and the best wet and dry rubbing fastness as the criteria.

8. The system according to claim 7, characterized in that, The first screening module specifically includes: A comparison interval determination unit, configured to determine a color feature value comparison interval according to the color feature L*a*b* value information of the color sample to be measured. The color feature value comparison interval includes a comparison interval of the color feature L* value, a comparison interval of the color feature a* value, and a comparison interval of the color feature b* value. An interval screening unit, configured to select fabric colors with color feature L*a*b* values within the color feature value comparison interval from the color database, denoted as target color reference samples. A total tolerance calculation and screening unit, configured to calculate the total tolerance between each target color reference sample and the color sample to be measured, and screen out all the target color reference samples with the total tolerance less than a preset value, which are the first screening color reference samples.

9. The system according to claim 8, wherein The interval screening unit specifically includes: An interval screening subunit, configured to screen out fabric colors in the color database with the color feature L* value within the comparison interval of the color feature L* value, the color feature a* value within the comparison interval of the color feature a* value, and the color feature b* value within the comparison interval of the color feature b* value.

10. The system according to claim 8, characterized in that, The total tolerance calculation and screening unit specifically includes: A total tolerance calculation sub-unit, configured to calculate the brightness difference, saturation difference, and hue difference between each of the target color reference samples and the color sample to be measured; and calculate the total tolerance according to the brightness difference, the saturation difference, and the hue difference.

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