How to confirm textile color sample

1 Color swatch self-evaluation
Use the gray card to match the color. Level 4.5 is required between the original sample and the sample. When using the measuring and matching instrument for color matching, generally △ E<1. In consideration of the system error, the internal control standard △ E<0.6, and strive to calibrate the sample once. If the requirements are high, the hue △ H and chromaticity △ C should also be considered.
It is necessary to fully understand the heat sensitivity and photosensitivity of dyes. There are few photosensitive dyes, such as Cibacron Yellow CR-01, especially Cibacron Yellow C-2R. Most dyes are more or less heat sensitive. Shilin dyes are more prominent, and cold, hot, dry and wet have an impact on the color light. When such dyes are used for proofing and color matching, the trend of dye color light after stabilization should be considered, and they are intended to deviate a little in the opposite direction. For example, when the color light of most dyes is stable, it tends to be a little deeper than the red light. When the sample is just finished and the color is slightly cold, the green light should be slightly brighter, so that the color light is just equal to the original sample when it is stable. Dyes with serious photosensitivity and heat sensitivity are used as the main color proofing, which may lead to color blocking of mass-produced color cloth, even irreversible in serious cases, such as olive green R, yellow C-2R and other dyes. Therefore, such dyes cannot be used.
Whether the prototype meets the customer's requirements, we should know well about the regular customer proofing, and it is easy to determine the sample according to the customer's habits. Different regions have different preferences for color. For example, orders in Europe should not be red, but can be slightly green. Different consumer groups of fabrics have different color and light preferences, for example, children's clothing generally likes flamboyance; Men's clothing should be as neutral as possible, with low color saturation and a little gray; Women's clothing should be bright and so on.
Generally, customers require at least 3 samples, i.e. A, B, C samples, and sometimes 12 samples. Consider from the aspects of depth, light and shade, bright and bright and color, so as to improve the one-time sample preparation rate.
2. Approval of sample
When the customer's opinion is different from the actual situation, the possible light source problem should be considered and communication with the customer should be made.
When the customer complains that most of the samples in a color palette are too deep, it should be considered that the customer may have double-layer matching, especially for thin and transparent fabrics, which will become darker when seen in layers. Some large companies require four layers of color matching for thin and transparent woven and knitted fabrics. The conventional method is single-layer color matching.
When the "light jump" is serious, consider changing the dye to improve the "light jump". To understand the "metamerism" performance of dyes, make full use of the colorimeter to screen dyes. When the applicable dyes of our factory can not meet the customer's requirements for "lamp skipping" or the "lamp skipping" is at △ E<0.5, we should communicate with the customer. Once the sample of our factory is confirmed and the confirmed sample is taken as the reference sample, there is no problem of "lamp skipping". Do not choose unstable dyeing formula for mass production to meet customer requirements.
During the color matching of small samples of direct production samples, try to match the color under various light sources, such as D65 natural light, fluorescent lamp, and do not have serious "jump". If it is serious, please confirm before production.
3 Confirmation of production of large sample (head cylinder sample)
The color light requirements for the production of large samples should be strictly in accordance with the customer's approval, and the deviation should be confirmed based on the original sample. It is better to persuade the customer to deviate from the original sample based on the confirmed sample. Because the fabric specification of the confirmed sample is consistent with that of the bulk sample, it is easy to see the sample, and the dye used is consistent, without "skipping". Generally, the color light is between the two, the gray card is above grade 4, and △ E<1 (internal control standard is generally △ E<0.8), which will be recognized by customers.
The batch difference shall be controlled above grade 4 of gray card, the color difference of left, middle and right shall be controlled above grade 4-5, and the batch difference △ E shall be less than 1 (within 0.8 of internal control). When selecting dyes, try to use dyes consistent with the sample formula. Adjust the color light. The newly added dye may cause the "light jump" phenomenon. When there is an obvious "light jump" between the large sample and the confirmed sample, there will be a risk of rejection of the large sample, which will bring economic losses and reduce the reputation of the enterprise. For example, when adding dyes with reversed spectra of common dyes, such as turquoise blue, shilline RB yuan, B green, T green, R scarlet, etc., care should be taken to check whether there is a serious "light jump" under various light sources. If there is, they should not be added.
In order to repeat and supplement the order, the confirmed sample of the head cylinder is generally used as the benchmark to bias towards the original sample and the confirmed sample, so as to keep the color light of the whole batch consistent. However, sometimes when the customer insists on taking the original sample or the confirmed sample as the benchmark, the color light trend must take into account the color light of large goods.
After finishing has an impact on the color light, and the color change of different colors is different. Therefore, after dyeing and setting out, the samples in the post finishing process should be dyed after adjusting the shade to meet customer requirements.