Silk Scarf for Washing Performance Testing and Method for Testing and Evaluating Using the Silk Scarf

Abstract

The present invention discloses a silk scarf for washing performance testing. The silk scarf includes a white area, a blue area and a cross-shaped marking. The present invention also discloses a method for testing and evaluating through this silk scarf. The main steps include: measuring the reflectance values of the white area of the silk scarf before and after washing by a spectrophotometer, and then calculating the yellowing degree of the white area; measuring the reflectance of the blue area of the silk scarf before and after washing by a spectrophotometer, and then calculating the color fastness of the blue area; and measuring the lengths of each line segment of the cross-shaped marking before and after washing, and then calculating different types of shrinkage rates. The silk scarf of the present invention can parallelly test the yellowing degree, color fastness and shrinkage rate caused by one washing on the same silk scarf, greatly improving the evaluation accuracy and efficiency of the washing effect or damage effect of a washing machine and / or detergent on silk materials.

Description

Technical Field

[0001] The present invention relates to a silk scarf, and particularly to a silk scarf for testing the pure silk washing program and the detergent for pure silk washing and care of household and similar electric washing machines, and a method for testing and evaluating using the silk scarf. Background Art

[0002] In the washing equipment industry, more and more domestic and foreign household washing machine enterprises develop washing machine products with the function of washing silk / silk fabrics. However, due to the differences in the set rotation speed, temperature, and duration of the silk / silk washing programs of different manufacturers, the product quality is uneven. Therefore, when evaluating the silk / silk washing performance of washing machine products, a special silk fabric is required to evaluate the silk / silk program. However, there is no such silk fabric at home and abroad at present.

[0003] In the daily chemical industry, there are numerous detergents for silk and wool, but their formulas are each unique. Some products cannot play a good nursing role for silk products while ensuring the removal of stains. Therefore, when evaluating detergents for pure silk washing and care, a special silk fabric is also required, and there is no such silk fabric at home and abroad at present.

[0004] In the prior art, the color fastness, yellowing degree, and shrinkage rate of other fabrics are measured separately, and there is no relevant report on simultaneous testing. The main problem with separate testing is that in each test, the washing conditions of the fabric are inconsistent. Therefore, it is not easy to accurately compare the three indicators. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a silk scarf capable of evaluating the performance of both washing machines with silk / silk programs and detergents for pure silk washing and care, and a method for testing and evaluating using the silk scarf.

[0006] The object of the present invention is achieved by the following technical solutions.

[0007] The first aspect of the present invention provides a silk scarf for washing performance testing, which includes a white area, a second color area, and one or more third color markings.

[0008] Wherein, the second color area and the third color markings are any two colors that can be clearly distinguished by the naked eye.

[0009] The third color markings are line segments. When there are more than one third color markings, different third color markings are parallel or / and intersecting.

[0010] The reflectance values of the white area and the second color area are measured using a spectrophotometer before and after washing the silk scarf, respectively, to evaluate the color fastness level index of different silk washing programs of the washing machine and the yellowing degree index of the silk washing and care detergent for the silk scarf.

[0011] Measure and record the length of the third color marking line before and after washing the silk scarf, respectively. The quality of different silk washing programs of the washing machine for the silk scarf shrinkage rate index can be directly reflected through digital comparison.

[0012] In this way, the changes in color fastness performance, yellowing degree, and shrinkage rate before and after washing the silk scarf are all completed on the same silk scarf, making the test conditions parallel, and thus integrating the tests of three indicators.

[0013] In some embodiments, the second color area is a blue area.

[0014] In some embodiments, the third color marking line is a black marking line.

[0015] In some embodiments, the third color marking line is located in the white area and / or the second color area.

[0016] In some embodiments, the third color marking line crosses the white area and the second color area.

[0017] In some embodiments, the third color marking line forms a cross shape (also known as a cross grid).

[0018] The cross shape can better compare the test results of different line segments. In addition, the number of warp and weft yarns of the silk scarf is different, so there will be differences in the shrinkage conditions in the horizontal and vertical directions. The cross-shaped third color marking line enables the measurement of shrinkage rates in different directions.

[0019] In some embodiments, the shape of the silk scarf is square.

[0020] In some embodiments, the center of the cross shape overlaps with the center of the silk scarf, and the sides of the cross shape are parallel to the sides of the silk scarf.

[0021] Such a setting makes the position of the cross shape on the silk scarf centrosymmetric, reducing the test error caused by inconsistent shrinkage degrees of the silk scarf due to unequal distances between the cross shape and the outer edge of the silk scarf.

[0022] In some embodiments, the white area and the second color area are arranged in intervals through two diagonals of the silk scarf.

[0023] That is, the silk scarf of the present invention is square. The two diagonals of the square divide the square silk scarf into four triangular regions, including two white regions, which are symmetrically arranged with respect to the center point of the square silk scarf; and two second-color regions, which are symmetrically arranged with respect to the center point of the square silk scarf. The white region is adjacent to the second-color region.

[0024] The advantage of such an arrangement is that the boundary line between white and blue is the longest, and the white region and the second-color region are symmetrically distributed, which helps the parallel comparison of these two regions.

[0025] In some embodiments, the color of the second-color region and the color of the third-color marking line are printed on the silk scarf by a printing method.

[0026] In some embodiments, the operating steps of the printing method are as follows:

[0027] 1), Make a printing plate pattern of the second-color region and the third-color marking line according to the flower pattern designed for the silk scarf;

[0028] 2), Make a printing plate according to the size and flower pattern requirements;

[0029] 3), Match colors, adjust colors, and print on the printing plate production line.

[0030] The second aspect of the present invention provides a method for testing and evaluating using the silk scarf for washing performance test described in the first aspect of the present invention. The method is to perform any one, any two, or all three of the first test, the second test, and the third test on the silk scarf;

[0031] The first test is to measure the reflectance of the silk scarf before washing and after washing and drying using the white region and calculate the yellowing degree of the silk scarf after washing;

[0032] The second test is to measure the reflectance of the silk scarf before washing and after washing and drying using the second-color region and calculate the color fastness of the silk scarf after washing;

[0033] The third test is to measure the length of the third-color marking line of the silk scarf after pre-treatment and after washing and obtain the shrinkage rate of the silk scarf after washing;

[0034] In some embodiments, the pre-treatment includes the following steps: soak the silk with a standard silk detergent, and then rinse the silk scarf with clean water.

[0035] In some embodiments, the pre-treatment includes the following steps: soak the silk in a diluted solution of a standard silk detergent at 1-3 g / L at 25-35 °C for 0.5-2 h, and then rinse the silk scarf with clean water.

[0036] In some embodiments, the first test includes the following steps:

[0037] Obtain the reflectance F0 of the white area of the silk scarf before washing;

[0038] Obtain the reflectance F1 of the white area of the silk scarf after washing and drying;

[0039] According to the formula T = F1 / F0 × 100%, calculate the yellowing degree T of the white area of the silk scarf before and after washing and drying.

[0040] In some embodiments, the first test includes the following steps:

[0041] Respectively obtain the sum of the reflectances of the white areas of N pieces of the silk scarves before washing to obtain F T0 ;

[0042] Respectively obtain the sum of the reflectances of the white areas of the silk scarves after washing and drying to obtain F T1 ;

[0043] According to the formula T T = F T1 / F T0 × 100%, calculate the yellowing degree T of the white area of the silk scarf before and after washing and drying T , where N is a natural number greater than or equal to 2.

[0044] In some embodiments, the second test includes the following steps:

[0045] Obtain the reflectance f of the second color area of the silk scarf before washing W ;

[0046] Obtain the reflectance f of the second color area of the silk scarf after washing and drying S ;

[0047] According to the formula F = |f S - f W |× 100%, calculate the color difference F of the second color area of the silk scarf before and after washing and drying;

[0048] Obtain the color fastness of the silk scarf through the color difference F.

[0049] In some embodiments, the reflectance is measured by a spectrophotometer.

[0050] In some embodiments, the third test includes the following steps:

[0051] Measure the length L0 of each of the third color markings after pre - treatment independently and separately;

[0052] Measure the length L1 of the third color markings after washing;

[0053] Calculate the shrinkage rate of the third color markings as (L0 - L1) / L0.

[0054] In some embodiments, when the third color markings form a cross shape, the four vertices of the cross are sequentially labeled A, B, F, E in clockwise order; the mid - point of AB is labeled G; the mid - point of BF is labeled D; the mid - point of FE is labeled H; the mid - point of EA is labeled C. The third test includes the following steps:

[0055] After pre - treating the silk scarf, measure the distance of AB in a standard tray, labeled as LR A-B ; measure the distance of CD, labeled as LR C-D ; measure the distance of EF, labeled as LR E-F ; measure the distance of AE, labeled as LR A-E ; measure the distance of GH, labeled as LR G-H ; measure the distance of BF, labeled as LR B-F ;

[0056] After washing the silk scarf, measure the distance of AB in a standard tray, labeled as LW A-B ; measure the distance of CD, labeled as LW C-D ; measure the distance of EF, labeled as LW E-F ; measure the distance of AE, labeled as LW A-E ; measure the distance of GH, labeled as LW G-H ; measure the distance of BF, labeled as LW B-F ;

[0057] Calculate the following indicators:

[0058] Calculate the first - direction average value after pre - treating the silk scarf according to the following formula

[0059]

[0060] Calculate the second - direction average value after pre - treating the silk scarf according to the following formula

[0061]

[0062] Calculate the first - direction average value after washing the silk scarf according to the following formula

[0063]

[0064] Calculate the average value in the second direction of the silk scarf after washing according to the following formula

[0065]

[0066] Calculate the shrinkage rate LS of the silk scarf in the first direction according to the following formula:

[0067]

[0068] Calculate the shrinkage rate WS of the silk scarf in the second direction according to the following formula:

[0069]

[0070] Calculate the shrinkage rate SR of the silk scarf according to the following formula:

[0071] SR = WS + LS - (WS × LS) / 100.

[0072] In some embodiments, place the silk scarf in a water-filled tray and measure the length of the independent third color marking line or the length of the line segment in the cross shape.

[0073] Through the above method, it is possible to obtain the yellowing degree, color fastness and shrinkage rate of the same silk scarf before and after one washing, achieving efficient and accurate integration.

[0074] During the test, it is necessary to ensure three elements:

[0075] The water temperature and mechanical rotation force under the same environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 It is a schematic diagram of the overall structure of the silk scarf of the present invention.

[0077] Figure 2 It is a schematic diagram of the shrinkage rate test principle of the silk scarf of the present invention.

[0078] Figure 3 It is a schematic diagram of the shrinkage rate test principle of the silk scarf without marked letters of the present invention.

[0079] Figure 4 It is a schematic diagram of the color fastness test principle of the silk scarf of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0080] To make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the specific embodiments of the present invention with reference to the drawings. The descriptions of these embodiments are used to help understand the present invention, but do not limit the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0081] Example 1: Silk Scarf Design

[0082] (1) The silk scarf design used in this example

[0083] As shown in Figure 1 、 Figure 2 and Figure 3 , this example provides a silk scarf for testing the performance of washing machines and detergents, including a white area, a blue area, and a grid formed by marking lines.

[0084] The silk scarf is square, and the sides of the grid are parallel to the outer edge of the silk scarf. Taking the diagonal of the silk scarf as the boundary, the whole silk scarf is arranged with blue areas and white areas alternating. That is, the diagonal equally divides the square silk scarf into four areas. In clockwise order, the colors of these four areas are white, blue, white, and blue respectively.

[0085] Dimensions of the silk scarf: 500mm × 500mm. The white area and the blue area are divided by the diagonal of the silk scarf.

[0086] Each side of the grid is marked as: side A - B → side C - D → side E - F → side B - F → side G - H → side A - E. Dimensions of the outer frame side length of the grid: 350mm × 350mm.

[0087] The vertical distance between the outer side of the grid and the adjacent silk scarf boundary is 75mm.

[0088] The marking lines forming the grid are black marking lines.

[0089] Among them, the white area is used to evaluate the yellowing degree index during the test of silk washing detergents. The blue area is used to evaluate the color fastness index of washing machines with silk / silk programs. The marking lines forming the grid are used to evaluate the shrinkage rate index of washing machines with silk / silk programs.

[0090] (2) Conventional indicators of the silk scarf used in this example:

[0091] Material: 100% mulberry silk.

[0092] Colors: blue, white, black.

[0093] Fabric: twill.

[0094] Mass per unit area: 56.6g / m 2 .

[0095] Color fastness: (2 - 3) levels.

[0096] Warp density: 43.53 threads / cm.

[0097] Weft density: 38.65 threads / cm.

[0098] (3) Preparation process of the color and pattern of the silk scarf in this embodiment:

[0099] a) Sorting process: The main colors are blue and white, with black lines in between;

[0100] b) Selection of pre-stain removal chemicals: No obvious stains;

[0101] c) Pre-stain removal process: No obvious stains;

[0102] d) Fixing agent dosage: 25 mL per piece;

[0103] e) Drying process: 2.5 h per piece;

[0104] f) Ironing process (suction or blowing): Suction;

[0105] g) Ironing temperature: 115 °C.

[0106] This process is plate printing. According to the design drawings, a color separation plate (blue and black areas) is made in advance. First, print the blue opposing triangles, and then print the black crosshatch grid lines. After printing, cut it into the specified size.

[0107] The white silk scarf is the original color of the blank. First, print a large area of blue color block on the white fabric, and then print the black crosshatch grid (to prevent mutual interference and bleeding).

[0108] Silk (acidic) dyes, using the blue dye N-GR dye and black dye MR dye of Yayun brand, and used according to the conventional method.

[0109] 1. A total of 2 color separations (blue and black) are required according to the design of the silk scarf.

[0110] 2. Make the plate according to the size and pattern requirements.

[0111] 3. Just perform color matching, color adjustment, and plate printing on the assembly line.

[0112] Example 2: Silk scarf testing method

[0113] For the silk scarf designed and obtained according to the method of Example 1, test the corresponding indicators of the same silk scarf before washing and after washing and drying respectively, calculate and obtain the color fastness and yellowing degree of the silk scarf. Before washing and after washing, measure the corresponding size of the same silk scarf in a standard tray, calculate and obtain the shrinkage rate of the silk scarf. The specific operation method is as shown below.

[0114] I. Color fastness testing method

[0115] The measuring instrument for color fastness is a spectrophotometer. The used spectrophotometer is the Datacolor600 model spectrophotometer produced by Datacolor Company.

[0116] The color fastness test method is shown in Figure 4 , in the figure, the 4 circles are the test points. Using the aforementioned spectrophotometer, measure the reflectance of the test points in the blue area of the silk scarf before washing, after washing and drying. Use the light source D65 / 10°, wavelength 400nm - 700nm, and calculate the color difference value of the silk scarf according to the reflectance.

[0117] 1. The calculation formula is:

[0118] The color difference value of the silk scarf is calculated according to the following formula:

[0119] F = |f S - f W | × 100%

[0120] In the formula:

[0121] F—the color difference value of the silk fabric, expressed as a percentage (%);

[0122] f S —the reflectance of the blue silk scarf after washing, expressed as a percentage (%);

[0123] f W —the reflectance of the blue silk scarf before washing, expressed as a percentage (%).

[0124] 2. Evaluation of the color fastness of the silk scarf

[0125] The color fastness of the silk scarf is confirmed by the color difference before washing, after washing and drying. According to the visual color difference, it is divided into five whole-level color fastness grades, namely 5, 4, 3, 2, 1. A half-level grade is added between every two grades, namely 4 - 5, 3 - 4, 2 - 3, 1 - 2, and it is expanded into a nine-grade card. Before the silk scarf is tested by the silk washing process, the reflectance before each washing is the original color. After washing, the color difference of the silk scarf gradually changes. The greater the color difference, the lower the color fastness grade, and the color fastness grade of the silk scarf is determined by Table 1.

[0126] Table 1. Color fastness grade of the silk scarf

[0127] Color fastness grade Y color difference value 5 0 (4-5) 2.2 4 4.3 (3-4) 6.0 3 8.5 (2-3) 12.0 2 16.9 (1-2) 24.0 1 34.1

[0128] The above method is used to measure the color fastness of the silk scarf after washing. After washing K times, according to the same principle and formula above, the color fastness of the silk scarf after the Kth washing relative to the unwashed silk scarf can be calculated based on the reflectance before the first washing and after the Kth washing and drying; or the color fastness caused by the Kth washing can be calculated based on the reflectance after the (K - 1)th washing and drying and after the Kth washing and drying.

[0129] This method can also use the pre-treatment method of the silk scarf in the shrinkage rate test method described below during the test, that is, measure the reflectance of the silk scarf before washing, after pre-treatment and then washing, measure the reflectance of the silk scarf, and calculate the color difference based on the two reflectances.

[0130] II. Yellowing degree test method

[0131] The reflectometer is used to measure the yellowing degree index. The reflectance of the spectrophotometer is the reflectance of the Datacolor600 model spectrophotometer produced by Datacolor Company. The reflectances of the test points in the white area of the silk scarf before washing, after washing and drying are measured using the aforementioned spectrophotometer. The light source is D65 / 10°, and the wavelength is 400nm - 700nm. The specific formula for calculating the yellowing degree is:

[0132] T = F1 / F0 × 100%;

[0133] Wherein, F0 is the reflectance value of the silk scarf before washing;

[0134] F1 is the reflectance value of the silk scarf after washing and drying;

[0135] T is the yellowing degree of the silk scarf.

[0136] In order to be able to examine the change in the yellowing degree of a silk scarf after being washed K times, the reflectance value of the silk scarf after the Kth wash can be divided by the reflectance value of the silk scarf before the first wash to calculate the yellowing degree of the silk scarf after the Kth wash.

[0137] In order to make the calculation of the yellowing degree more accurate, the reflectance values before and after washing can be measured for N silk scarves treated with parallel washing respectively, and the average yellowing degree can be calculated. The specific formula for calculating the average yellowing degree is:

[0138] T T = F T1 / F T0 × 100%;

[0139] Wherein, F T0 is the sum of the reflectance values of N silk scarves before washing;

[0140] F T1 is the sum of the reflectance values of N silk scarves after washing;

[0141] T T is the average yellowing degree of N silk scarves.

[0142] To calculate the yellowness more accurately and examine the change in yellowness of N silk scarves after being washed K times, the sum of the reflectance values of the N silk scarves after the K - th wash can be divided by the sum of the reflectance values of these N silk scarves before the first wash to calculate the average yellowness of the N silk scarves after the K - th wash.

[0143] In this method, during the test, the pre - treatment method of the silk scarves in the shrinkage rate test method described below can also be used, that is, measure the reflectance of the silk scarves before washing, after pre - treatment and then washing, measure the reflectance of the silk scarves, and calculate the yellowness based on the two reflectance values.

[0144] III. Shrinkage Rate Test Method

[0145] Pre - treatment of Silk Scarves

[0146] Before washing the silk scarves, pre - treatment is also carried out on the silk scarves. The specific steps are as follows: Put 3 g of standard silk detergent (White Cat brand silk detergent) into 1.5 L of water at a temperature of 30 °C for mixing, and then put the silk scarves into the mixed solution for soaking. After 1 h, take out the silk scarves soaked in the mixed solution and immediately put them into a container with 1.5 L of test water for rinsing without agitation for 10 min, and rinse three times. Completely immerse the rinsed silk scarves in a tray filled with test water (test water with a hardness of 50 mol / L) with a water depth of 1 cm. There should be no bubbles and deformation. The role of pre - treatment is to eliminate the shrinkage factors generated by the silk scarves themselves when encountering water, so that the change in the marked line length measured for calculating the shrinkage rate is caused by washing rather than by encountering water, in order to better evaluate the shrinkage caused by the washing machine and more accurately compare the influence of different washing machines on the shrinkage of silk scarves.

[0147] After the pre - treatment of the silk scarves, measure the distance of AB in a standard tray (the tray is filled with 1 cm deep of water, and the water can make the silk scarf spread out flat for easy measurement), and label it as LR A-B ; Measure the distance of CD, and label it as LR C-D ; Measure the distance of EF, and label it as LR E-F ; Measure the distance of AE, and label it as LR A-E ; Measure the distance of GH, and label it as LR G-H ; Measure the distance of BF, and label it as LR B-F .

[0148] After washing the silk scarves, also measure the distance of AB in the tray (the tray is filled with 1 cm deep of water), and label it as LW A-B ; Measure the distance of CD, and label it as LW C-D ; Measure the distance of EF, and label it as LW E-F ; Measure the distance of AE, and label it as LW A-E ; Measure the distance of GH, and label it as LWG-H ; Measure the distance of BF, marked as LW B-F . The shrinkage rate index calculation formula is as follows:

[0149] 1). Average length of the silk scarf after pretreatment Calculate according to formula (C.1)

[0150]

[0151] Note 1: LR—Measured value of the length of the silk scarf after pretreatment, unit: mm.

[0152] 2). Average width of the silk scarf after pretreatment Calculate according to formula (C.2)

[0153]

[0154] 3). Average length of the silk scarf after washing Calculate according to formula (C.3)

[0155]

[0156] Note 2: LW—Measured value of the length of the silk scarf after washing, unit: mm.

[0157] 4). Average width of the silk scarf after washing Calculate according to formula (C.4)

[0158]

[0159] 5). Linear shrinkage rate LS of the length after washing is calculated according to formula (5)

[0160]

[0161] 6). Linear shrinkage rate WS of the width after washing is calculated according to formula (6)

[0162]

[0163] 7). Shrinkage rate SR of the silk scarf after washing is calculated according to formula (C.7)

[0164] SR = WS + LS - (WS × LS) / 100 ………………………… (C.7)

[0165] As a simplified calculation method, for any marking line in the grid, the shrinkage rate of the washing for this marking line can be calculated by (L0 - L1) / L0 with the length L0 after pretreatment and the length L1 after washing.

[0166] In this embodiment, the shrinkage rate can also be calculated according to the lengths of the marking lines in the grid after pretreatment and after washing.

[0167] Example 3: Silk scarf test example

[0168] Take 6 silk scarves prepared in Example 1, mark them, and measure the reflectivity of the white area and the blue area according to the method of Example 2.

[0169] Six silk scarves were pre-treated according to the method of Example 2, and then the distances AB, CD, EF, AE, GH, and BF were measured.

[0170] Three silk scarves were placed in each of the Miele and Bosch washing machines, and the silk washing program was used for each washing machine. 20 g of White Cat silk detergent and 20 L of water were added. After running the built-in silk washing program, the distances AB, CD, EF, AE, GH, and BF of the six silk scarves were measured according to the method of Example 2.

[0171] Use a household electric iron with a surface temperature of 80°C to 100°C to iron 6 silk scarves through white cloth, dry them, and then measure the reflectivity of the white area and the blue area according to the method of Example 2.

[0172] The yellowing degree, color fastness and shrinkage rate of each silk scarf were calculated according to the method of Example 2, and the average values ​​are shown in Table 2.

[0173] The above operation was repeated three times independently, and the results are shown in Table 2.

[0174] Table 2. Comparison of yellowing, color fastness and shrinkage performance of different washing machines

[0175]

[0176] From the data in Table 2, it can be seen that the yellowing, color fastness and shrinkage are significantly different. Under the same detergent conditions, the method of Example 2 of the present invention can well distinguish the yellowing, color fastness and shrinkage indicators of silk washed by different washing machines. The same detergent and dosage, the yellowing of different washing machines is significantly different, while the difference between different batches of the same washing machine is not obvious, which shows that the washing machine and the physical washing process also have an impact on the yellowing of the silk scarf.

[0177] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A silk scarf for washing performance testing, the silk scarf for washing performance testing includes a white area, a second color area, and one or more third color markings; The third color markings are located in the white area and the second color area; The third color markings span across the white area and the second color area; The second color area and the third color markings are any two colors that can be clearly distinguished by the naked eye; The third color markings form a cross shape; The shape of the silk scarf is square; The center of the cross shape overlaps with the center of the silk scarf, and the sides of the cross shape are parallel to the sides of the silk scarf; The white area and the second color area are arranged at intervals through the two diagonals of the silk scarf.

2. The silk scarf for washing performance testing according to claim 1, wherein: The second color area is a blue area; and / or The third color markings are black markings.

3. The silk scarf for washing performance testing according to any one of claims 1-2, wherein: The colors of the second color area and the third color markings are printed on the silk scarf by a printing method.

4. The silk scarf for washing performance testing according to claim 3, wherein: The operating steps of the printing method are: 1), Make a printing plate pattern of the second color area and the third color markings according to the flower pattern designed for the silk scarf; 2), Plate making according to the size and flower pattern requirements; 3), Color matching, color adjustment, and printing on the plate production line.

5. A method for testing and evaluating using the silk scarf for washing performance testing according to any one of claims 1-4, the method is to conduct a first test, a second test, and a third test on the silk scarf; The first test is to measure the reflectance of the silk scarf before washing and after washing and drying using the white area and calculate the yellowing degree of the silk scarf after washing; The second test is to measure the reflectance of the silk scarf before washing and after washing and drying using the second color area and calculate the color fastness of the silk scarf after washing; The third test is to measure the length of the third color markings of the silk scarf before and after washing after pretreatment and obtain the shrinkage rate of the silk scarf after washing.

6. The method for testing and evaluating according to claim 5, wherein: The pretreatment includes the following steps: Soak the silk with a standard silk detergent, and then rinse the silk scarf with clean water.

7. The method for testing and evaluating according to claim 5, wherein: The pretreatment includes the following steps: Soak the silk in a diluted solution of a standard silk detergent at 1-3 g / L at 25-35 °C for 0.5-2 h, and then rinse the silk scarf with clean water.

8. The method for testing and evaluating according to claim 5, wherein: The first test includes the following steps: Obtain the reflectance F0 of the white area of the silk scarf before washing; Obtain the reflectance F1 of the white area of the silk scarf after washing and drying; Calculate the yellowing degree T of the white area of the silk scarf before and after washing and drying according to the formula T = F1 / F0 × 100%; Or, the first test includes the following steps: Sum the reflectance of the white areas of the N silk scarves before washing to obtain F T0 ; Obtain the reflectance after washing and drying the white area of the silk scarf and derive F respectively T1 ; According to the formula T T = F T1 / F T0 × 100%, calculate the yellowing degree T T of the white area of the silk scarf before washing and after washing and drying, where N is a natural number greater than or equal to 2.

9. The method for test and evaluation according to claim 5, wherein: The second test comprises the following steps: Obtain the reflectance f of the second color area of the silk scarf before washing W ; Obtain the reflectance f after washing and drying the second color area of the silk scarf S ; According to the formula F = |f S - f W |×100%, calculate the color difference value F of the second color area of the silk scarf before washing and after washing and drying; The color fastness of the silk scarf is obtained through the color difference value F.

10. The method for test and evaluation according to claim 5, wherein: The reflectance is measured by a spectrophotometer.

11. The method for test and evaluation according to claim 5, wherein: The third test comprises the following steps: Independently measure the length L0 of the third color marking line after pretreatment for each of the third color marking lines; Measure the length L1 of the third color marking line after washing; Calculate the shrinkage rate of the third color marking line as (L0 - L1) / L0; or When the third color marking line forms a cross shape, the four vertices of the cross are sequentially marked as A, B, F, and E in clockwise order; the midpoint of AB is marked as G; the midpoint of BF is marked as D; the midpoint of FE is marked as H; the midpoint of EA is marked as C. The third test comprises the following steps: After the silk scarf is pre-treated, measure the distance of AB and label it as LR A-B ; Measure the distance of CD and label it as LR C-D ; Measure the distance of EF and label it as LR E-F ; Measure the distance of AE and label it as LR A-E ; Measure the distance of GH and label it as LR G-H ; Measure the distance of BF and label it as LR B-F ; After washing the silk scarf, measure the distance of AB, marked as LW A-B ; Measure the distance of CD, marked as LW C-D ; Measure the distance of EF, marked as LW E-F ; Measure the distance of AE, marked as LW A-E ; Measure the distance of GH, marked as LW G-H ; Measure the distance of BF, marked as LW B-F ; Calculate the following indicators: Calculate the average value in the first direction after the pre-treatment of the silk scarf according to the following formula Calculate the average value in the second direction after the pre-treatment of the silk scarf according to the following formula Calculate the average value of the silk scarf in the first direction after washing according to the following formula Calculate the average value in the second direction after the silk scarf is washed according to the following formula Calculate the shrinkage rate LS of the silk scarf in the first direction according to the following formula: Calculate the shrinkage rate WS of the silk scarf in the second direction according to the following formula: Calculate the shrinkage rate SR of the silk scarf according to the following formula: SR = WS + LS - (WS × LS) / 100.

12. The method for test and evaluation according to claim 11, characterized in that: When calculating the shrinkage rate SR of the silk scarf, place the silk scarf in a tray filled with water and measure the length of the independent third color marking line or the length of the line segments in the cross shape.

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