Method for testing cleaning capability of skin cleaning product
Through the automatic testing device, the cosmetic makeup area is repeatedly cleaned and the test data is recorded, which solves the problem of human factors and the unfixed thickness of the cosmetics in the prior art, and achieves a more accurate cleaning ability test.
Patent Information
- Application Number
- CN202510421766.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-05-13
Smart Images
Figure CN119985354A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of analysis and detection, and in particular relates to a method for testing the cleaning ability of a skin cleaning product. Background Art
[0002] Cosmetics contain a large amount of ingredients such as mica, titanium dioxide, pigments, etc. that are not absorbed by the skin. In order to prevent skin problems caused by cosmetic residues, it is usually necessary to use skin cleansing products such as makeup remover to clean facial cosmetics.
[0003] When testing the cleaning ability of skin cleaning products, it is necessary to apply cosmetics in the test area. At present, in order to make the test data accurate, the same thickness of cosmetics is often applied in the test area through instruments such as scraper coaters, film coating machines, and four-sided preparation devices. However, this is not a normal makeup technique. Normal manual makeup includes layers of skin care products, base makeup, makeup, etc., which are difficult to simulate through equipment such as scraper coaters. However, if makeup is applied manually in the test area, there will be a problem of non-fixed thickness of the cosmetic coating between the test samples. The thickness of the cosmetics tested in each batch is not the same, resulting in a large deviation in the cleaning ability evaluation obtained.
[0004] Therefore, it is particularly important to provide a testing method for the cleansing ability of skin cleansing products that can reduce human factors and reduce testing errors caused by the thickness of cosmetic topcoats. Summary of the invention
[0005] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a method for testing the cleaning ability of skin cleaning products; the testing device and the testing method can reduce human factors and reduce the testing errors caused by the thickness of the cosmetic top.
[0006] The idea of the present invention is: by repeatedly cleaning the cosmetic application area through an automatic testing device and recording the test data after each cleaning, the data of multiple tests can be linearly fitted, and by comparing the slopes of the linear fitting of the test data of each skin cleansing product, the cleaning ability of each product can be compared.
[0007] A first aspect of the present invention provides a method for testing the cleansing ability of a skin cleansing product.
[0008] Specifically, a method for testing the cleaning ability of a skin cleaning product, the testing method using a testing device, the testing device comprising a moving mechanism, a rotating disk, a liquid adding mechanism, a cleaning mechanism, and a testing mechanism; The rotating disk includes a rotating shaft, the upper end of which is fixedly connected to the moving mechanism; the lower side of the rotating disk is fixedly connected to the liquid adding mechanism, the cleaning mechanism and the testing mechanism respectively, and the rotating disk can drive the liquid adding mechanism, the cleaning mechanism and the testing mechanism to rotate; The moving mechanism can drive the rotating shaft to move up and down and / or horizontally; The liquid adding mechanism can be filled with skin cleaning products and can add liquid to the test area; The cleaning mechanism comprises a telescopic component connected to the lower side of the rotating disk and a cleaning component connected to the lower end of the telescopic component, and the cleaning component can clean the test area; The testing mechanism is capable of measuring at least one value in the testing area including black and white degree, red and green degree, yellow and blue degree, friction coefficient, glossiness, reflectivity, and skin resistance; The test method comprises the following steps: (1) The testing mechanism measures at least one value of the black and white degree (whiteness value), red and green degree, yellow and blue degree, friction coefficient, glossiness, reflectivity, and skin resistance in the test area coated with cosmetics; (2) the liquid adding mechanism filled with the skin cleaning product adds liquid to the test area; (3) adjusting the telescopic component so that the pressure of the cleaning component on the test area reaches a set value; (4) The cleaning component cleans the test area; (5) The testing mechanism measures at least one value of the black and white degree (whiteness value), red and green degree, yellow and blue degree, friction coefficient, glossiness, reflectivity, and skin resistance in the test area after cleaning; (6) Repeat steps (2) to (5).
[0009] Preferably, the numerical value type tested in step (2) is the same as that tested in step (5).
[0010] Compared with the prior art, the beneficial effects of the method for testing the cleaning ability of skin cleansing products provided in the first aspect are as follows: by repeatedly cleaning the test area with an automatic testing device and recording the test data after each cleaning, it is possible to perform linear fitting on the data of multiple tests, or by comparing the changing trends of the test data of each skin cleansing product, the cleaning ability of each product can be compared; thereby, it is possible to use manual makeup to apply to the test area instead of applying cosmetics with a scraper, so as to obtain more accurate cleaning ability test data.
[0011] Preferably, the moving mechanism comprises a moving lifting arm.
[0012] Preferably, the liquid adding mechanism includes at least one liquid adding device selected from the group consisting of a syringe, a pipette, a diaphragm water pump, a piston water pump, a magnetic water pump, a gear pump, and a spray pot.
[0013] Preferably, the telescopic component comprises a telescopic rod.
[0014] Preferably, the cleaning assembly includes a casing, a motor and a transmission component arranged inside the casing, and a cleaning disc arranged at the bottom of the casing, the motor drives the cleaning disc to rotate through the transmission component, and the cleaning disc includes a cleaning body detachably connected to the bottom of the cleaning disc.
[0015] Preferably, the housing is connected to the lower end of the telescopic rod.
[0016] Preferably, the cleaning body includes at least one of a sponge, a brush, a flannel, and a paper towel.
[0017] Preferably, the transmission component includes a transmission shaft.
[0018] Preferably, the cleaning component further comprises a pressure sensor, wherein the pressure sensor is located between the cleaning disc and the cleaning body, and the pressure sensor is used to measure the pressure at the bottom of the cleaning component.
[0019] Preferably, the testing mechanism includes at least one of a spectrophotometer, a friction coefficient tester, a gloss meter, a reflectivity meter, and a skin resistance meter.
[0020] It should be noted that in step (1), the cosmetics applied to the test area may be applied by a coating machine, a scraper, a film coating machine, a four-sided preparation device, or may be applied manually. The technicians in this field may make the selection according to actual needs, and the present invention does not impose any specific limitation.
[0021] Preferably, in step (1), the cosmetics applied to the test area are applied by a scraper, the scraper comprises a scraper, and the shape of the scraper comprises at least one of a circular shape, a sector shape, and a square shape.
[0022] Preferably, the coating is performed by adding a paste or powder cosmetic and then controlling the thickness between the scraper and the test area by the scraper coating machine.
[0023] Preferably, in step (1), the cosmetics include at least one of skin care products, base makeup products, and color makeup products; further preferably, the cosmetics include at least two of skin care products, base makeup products, and color makeup products; further preferably, the cosmetics include base makeup products and color makeup products.
[0024] Preferably, in step (2), the amount of liquid added is greater than 0 and less than or equal to 10 mL; further preferably, the amount of liquid added is greater than 0 and less than or equal to 5 mL; further preferably, the amount of liquid added is greater than 0 and less than or equal to 1 mL; further preferably, the amount of liquid added is greater than 0 and less than or equal to 0.5 mL; further preferably, the amount of liquid added is greater than 0 and less than or equal to 0.1 mL.
[0025] Preferably, in step (3), the preset value of the pressure is greater than 0 and less than 1 kg / cm 2 ; Further preferably, the preset value of the pressure is greater than 0 and less than 0.1kg / cm 2 ; Further preferably, the preset value of the pressure is greater than 0 and less than 10g / cm 2 ; Further preferably, the preset value of the pressure is greater than 0 and less than or equal to 1g / cm 2 ; Further preferably, the preset value of the pressure is greater than 0 and less than or equal to 0.1g / cm 2 .
[0026] Preferably, in step (4), the cleaning includes the motor driving the cleaning disc to rotate via the transmission component so that the cleaning body and the test area generate mutual friction.
[0027] Preferably, the rotation speed of the cleaning disk is greater than 0 and less than 60 r / min; further preferably, the rotation speed of the cleaning disk is greater than 0 and less than or equal to 30 r / min; further preferably, the rotation speed of the cleaning disk is greater than 0 and less than or equal to 10 r / min.
[0028] Preferably, the cleaning disk rotates for a time greater than 0 and less than 60 min; further preferably, the cleaning disk rotates for a time greater than 0 and less than or equal to 10 min; further preferably, the cleaning disk rotates for a time greater than 0 and less than or equal to 1 min.
[0029] Preferably, in step (4), the cleaning further includes replacing the cleaning body.
[0030] Preferably, in step (6), the number of repetitions is 1 to 30 times; further preferably, the number of repetitions is 1 to 10 times.
[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By repeatedly cleaning the test area with an automatic testing device and recording the test data after each cleaning, it is possible to perform linear fitting on the data of multiple tests, or compare the cleaning capabilities of various products by comparing the test data change trends of various skin cleansing products; thus, it is possible to manually apply makeup to the test area instead of applying cosmetics with a doctor coater, thereby obtaining more accurate cleaning capability test data; (2) The testing mechanism in the automatic testing device can flexibly select spectrophotometers, friction coefficient testers, gloss meters, reflectance meters, and skin resistance meters, and can compare different physical data to obtain more accurate test results; at the same time, an automatic coating machine can also be used to coat the test area with cosmetics to achieve the purpose of uniform cosmetic thickness. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 This is a schematic diagram of the structure of a testing device according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the cleaning component in the testing device of the first embodiment of the invention; Reference numerals: The movable lifting arm 100, the rotating disk 200, the rotating shaft 210, the syringe 300, the cleaning mechanism 400, the telescopic rod 420, the cleaning assembly 430, and the spectrophotometer 500; Casing 431 , transmission shaft 432 , motor 433 , cleaning disc 434 , and lint brush 435 . DETAILED DESCRIPTION
[0033] In order to make the technical solution of the present invention more clearly understood by those skilled in the art, the following embodiments are listed for illustration. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. It should be noted that the following embodiments do not limit the scope of protection claimed by the present invention.
[0034] The test area in the embodiments and comparative examples of the present invention is a square artificial leather area of 3 cm×3 cm, and the color numbers of the artificial leathers are the same.
[0035] The cosmetics applied in the test area in the embodiments and comparative examples of the present invention are applied to pig skin manually, first applying foundation and then blush; before the cleaning test of each embodiment and comparative example, the thickness of the cosmetic coating in the test area is measured using an electronic micrometer using "Method 4A-Thickness Difference Method" in GB 13452.2-2008.
[0036] The larger the degree of black and white L is, the whiter the skin is, and the smaller the degree of black and white L is, the darker the skin is. Example 1
[0037] A method for testing the cleaning ability of a No. 1 makeup remover, the method using a testing device.
[0038] Figure 1 is a schematic diagram of the structure of a testing device according to Embodiment 1 of the present invention, Figure 2 This is a schematic diagram of the structure of the cleaning component in the testing device of embodiment 1 of the invention.
[0039] The testing device includes a movable lifting arm 100, a rotating disk 200, a syringe 300, a cleaning mechanism 400, and a spectrophotometer 500; The rotating disk 200 includes a rotating shaft 210, the upper end of which is fixedly connected to the movable lifting arm 100; the lower side of the rotating disk 200 is fixedly connected to the syringe 300, the cleaning mechanism 400 and the spectrophotometer 500, respectively, and the rotating disk 200 can drive the syringe 300, the cleaning mechanism 400 and the spectrophotometer 500 to rotate; The movable lifting arm 100 can drive the rotating shaft 210 to move up and down and horizontally; The syringe 300 can be filled with No. 1 makeup remover and can add liquid to the test area; The cleaning mechanism 400 includes a telescopic rod 420 connected to the lower side of the rotating disk 200 and a cleaning assembly 430 connected to the lower end of the telescopic rod 420. The cleaning assembly 430 can clean the test area. The cleaning assembly 430 includes a casing 431 connected to the lower end of the telescopic rod 420, a motor 433 and a transmission shaft 432 arranged inside the casing 431, and a cleaning disc 434 arranged at the bottom of the casing 431. The motor 433 drives the cleaning disc 434 to rotate through the transmission shaft 432. The cleaning disc 434 includes a fluff brush 435 detachably connected to the bottom of the cleaning disc 434.
[0040] The test method includes the following steps: (1) The spectrophotometer measures the black and white values in the test area coated with cosmetics (the data is recorded as L0); (2) Use a syringe filled with No. 1 makeup remover to drip 0.5 mL of makeup remover onto the test area; (3) Adjust the telescopic rod so that the pressure of the cleaning component on the test area reaches the set value of 1g / cm 3 ; (4) The cleaning component cleans the test area. The cleaning disc rotates at a speed of 10 r / min for 3 minutes. After cleaning, a new fluff brush is replaced on the cleaning disc. (5) The spectrophotometer measures the black and white values in the cleaned test area (the data is recorded as L1, and the data of subsequent repeated test steps are recorded as L2, L3, L4, L5, and L6 in sequence); (6) Repeat steps (2) to (5) five times.
[0041] The thickness of the cosmetic coating in the test area was measured to be 11 ± 1 μm before the cleaning test.
[0042] The data of black and white degree are recorded in Table 1. Example 2
[0043] Another method for testing the cleaning ability of No. 1 makeup remover; Example 2 differs from Example 1 in that the thickness of the cosmetic coating in the test area is measured to be 42±1 μm before the cleaning test.
[0044] The data of black and white degree are recorded in Table 1. Example 3
[0045] A method for testing the cleaning ability of No. 2 makeup remover; the difference between Example 3 and Example 1 is that the makeup removal ability product tested by this method is No. 2 makeup remover, and the thickness of the cosmetic coating in the test area is measured to be 12±1 μm before the cleaning test. Example 4
[0046] Another method for testing the cleaning ability of No. 2 makeup remover: Example 4 is different from Example 3 in that the thickness of the cosmetic coating in the test area is measured to be 39±1 μm before the cleaning test.
[0047] Table 1 Black and white data of Examples 1-4 Example 1 Example 2 Example 3 Example 4 Test subjects No.1 Makeup Remover No.1 Makeup Remover Makeup remover water No.2 Makeup remover water No.2 Cosmetic coating thickness 11±1μm 42±1μm 12±1μm 39±1μm L0 73.64 74.17 73.34 74.13 L1 71.82 73.62 72.40 73.82 L2 70.35 71.48 71.38 72.68 L3 68.51 69.35 70.12 71.45 L4 68.07 68.11 68.84 70.37 L5 67.44 67.41 67.49 68.51 L6 67.32 67.36 67.43 67.41 Comparative Example 1 Another method for testing the cleaning ability of No. 1 makeup remover is as follows: (1) The spectrophotometer measures the black and white values in the test area coated with cosmetics, and the data is recorded as L0; (2) Add 3 mL of No. 1 makeup remover to the test area; (3) Using the same model of cleaning disc equipped with a velvet brush as in the test device of Example 1, 3 The pressure was 10 r / min and the speed was 10 r / min. The test area was cleaned for 3 min. (5) The spectrophotometer measures the black and white values of the test area after cleaning, and the data is recorded as L1.
[0048] The thickness of the cosmetic coating in the test area was measured to be 10 ± 1 μm before the cleaning test.
[0049] The black and white data are recorded in Table 2.
[0050] Comparative Example 2 Another method for testing the cleaning ability of No. 1 makeup remover, Comparative Example 2 is different from Comparative Example 1 in that the thickness of the cosmetic coating in the test area is measured to be 41±1 μm before the cleaning test.
[0051] The black and white data are recorded in Table 2.
[0052] Comparative Example 3 A method for testing the cleaning ability of No. 2 makeup remover; the difference between Comparative Example 3 and Comparative Example 1 is that the makeup removal ability product tested by this method is No. 2 makeup remover, and the thickness of the cosmetic coating in the test area is measured to be 11±1 μm before the cleaning test.
[0053] The black and white data are recorded in Table 2.
[0054] Comparative Example 4 Another method for testing the cleaning ability of No. 2 makeup remover; Comparative Example 4 is different from Comparative Example 3 in that the thickness of the cosmetic coating in the test area is measured to be 40±1 μm before the cleaning test.
[0055] The black and white data are recorded in Table 2.
[0056] Table 2 Black and white data of comparative examples 1-4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Test subjects No.1 Makeup Remover No.1 Makeup Remover Makeup remover water No.2 Makeup remover water No.2 Cosmetic coating thickness 10±1μm 41±1μm 11±1μm 40±1μm L0 73.69 74.11 73.28 74.01 L1 68.42 69.47 70.07 71.57 When the data of Comparative Examples 2 and 3 are used to evaluate the cleaning ability of Makeup Remover No. 1 and Makeup Remover No. 2, it is found that the cleaning ability of the makeup remover products is not much different; and from the data of Example 2 and Example 3, it can be clearly seen that the cleaning ability of Makeup Remover No. 1 is greater than that of Makeup Remover No. 2.
Claims
1. A method for testing the cleaning ability of skin cleaning products, characterized in that: The testing method uses a testing device, which includes a moving mechanism, a rotating disk, a liquid adding mechanism, a cleaning mechanism, and a testing mechanism; The rotating disk includes a rotating shaft, the upper end of which is fixedly connected to the moving mechanism; the lower side of the rotating disk is fixedly connected to the liquid adding mechanism, the cleaning mechanism and the testing mechanism respectively, and the rotating disk can drive the liquid adding mechanism, the cleaning mechanism and the testing mechanism to rotate; The moving mechanism can drive the rotating shaft to move up and down and / or horizontally; The liquid adding mechanism can be filled with skin cleaning products and can add liquid to the test area; The cleaning mechanism comprises a telescopic component connected to the lower side of the rotating disk and a cleaning component connected to the lower end of the telescopic component, and the cleaning component can clean the test area; The testing mechanism is capable of measuring at least one value in the testing area including black and white degree, red and green degree, yellow and blue degree, friction coefficient, glossiness, reflectivity, and skin resistance; The test method comprises the following steps: (1) The testing mechanism measures at least one value of the black and white degree, red and green degree, yellow and blue degree, friction coefficient, glossiness, reflectivity, and skin resistance in the test area coated with cosmetics; (2) the liquid adding mechanism filled with the skin cleaning product adds liquid to the test area; (3) adjusting the telescopic component so that the pressure of the cleaning component on the test area reaches a set value; (4) The cleaning component cleans the test area; (5) The testing mechanism measures at least one value of black and white saturation, red and green saturation, yellow and blue saturation, friction coefficient, glossiness, reflectivity, and skin resistance in the test area after cleaning; (6) Repeat steps (2) to (5).
2. The testing method according to claim 1, characterized in that: The cleaning assembly includes a casing, a motor and a transmission component arranged inside the casing, and a cleaning disc arranged at the bottom of the casing. The motor drives the cleaning disc to rotate through the transmission component, and the cleaning disc includes a cleaning body detachably connected to the bottom of the cleaning disc.
3. The testing method according to claim 2, characterized in that: The cleaning body includes at least one of a sponge, a brush, a flannel, and a paper towel.
4. The testing method according to claim 2, characterized in that: The cleaning component further comprises a pressure sensor, wherein the pressure sensor is located between the cleaning plate and the cleaning body, and the pressure sensor is used to measure the pressure at the bottom of the cleaning component.
5. The testing method according to claim 1, characterized in that: In step (1), the cosmetics applied to the test area are applied by a scraper, and the scraper includes a scraper, and the shape of the scraper includes at least one of a circular shape, a fan shape, and a square shape.
6. The testing method according to claim 1, characterized in that: In step (2), the amount of liquid added is greater than 0 and less than or equal to 10 mL.
7. The testing method according to claim 1, characterized in that: In step (3), the preset value of the pressure is greater than 0 and less than 0.1 kg / cm 2 .
8. The testing method according to claim 2, characterized in that: The rotation speed of the cleaning disk is greater than 0 and less than 60 r / min, and the rotation time of the cleaning disk is greater than 0 and less than 60 min.
9. The testing method according to claim 2, characterized in that: In step (4), after the cleaning, the step further includes replacing the unused cleaning body.
10. The testing method according to claim 1, characterized in that: In step (6), the number of repetitions is 1 to 30 times.