How to confirm the color sample of textiles

1 Swatch Self-Assessment

Match colors with gray cards. A grade of 4.5 is required between the original and the sample. When using the color matching instrument, generally △E<1, considering the system error, the internal control standard △E<0.6, and strive to be a sample. If the requirements are high, the hue ΔH and chroma ΔC should also be considered.

To fully understand the heat sensitivity and photosensitivity of dyes. There are fewer photosensitizing dyes, such as Cibaclone Yellow CR-01, especially Cibaclone Yellow C-2R. Most dyes are more or less heat-sensitive. Shihlin dyes are more prominent. Cold, hot, dry and wet have an impact on color and light. When proofing and color matching of such dyes, the trend of dye color and light stabilization should be considered, and the intention is to reverse the direction. Deviate a bit. For example, most dyestuffs tend to be slightly darker in red light after the color light is stabilized. When the color is slightly cold after the sample is printed, the green light should be slightly brighter, so that the color light is just equal to the original when the color light is stable. The dyes with serious photosensitivity and heat sensitivity are used as the main color proofing, which may cause the color profile of the large-scale production of color cloth, and 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, it is necessary to know the proofing of the regular customers, and it is easy to make the sample according to the customer's habits. Different regions have different color preferences. For example, European orders should avoid red and can be slightly green. Different consumer groups of fabrics have different color and light preferences. For example, children's clothing generally likes bright colors; men's clothing should try to be neutral, with low color saturation and darker colors; women's clothing should be brighter.

Generally, customers require at least 3 prototype samples, namely A, B, C samples, and sometimes 12 samples are required. Considering the depth, light and shade, bright light and color, so as to improve the first-time sample rate.

2 Recognition of the sample

When the customer's opinion differs from the actual situation, the possible light source problem should be considered and communicated with the customer.

When the customer responds that most of the samples in a color palette are too dark, it should be considered that the customer may be double-layered, especially for thin and transparent fabrics, and the stacked samples will appear darker. Some large companies require 4 layers of color matching for thin, transparent woven and knitted fabrics. The conventional is a single-layer color matching.

When the "jump light" is serious, consider replacing the dye to improve the "jump light". To understand the "metameric" properties of dyes, use a colorimeter to screen dyes. When the dyes applied by our factory cannot meet the customer's "jump light" requirements or the "jump light" is at △E<0.5, we should communicate with the customer. Once the factory's sample is confirmed, and the confirmed sample is used as the reference sample, there is no "jump light" problem. Never choose an unstable dyeing formula for mass production in order to meet customer requirements.

When matching the color of the sample directly produced, try to match the color under various light sources, such as D65 natural light, fluorescent light, and do not have serious "jumping lights". If it is serious, please confirm the production before the customer.

3 Confirmation of production of large sample (head cylinder sample)

The color and light requirements for the production of large samples should be strictly in accordance with the customer's approval opinions, and the original sample should be used as the basis to deviate from the confirmed sample. Because the fabric specifications of the confirmation sample are consistent with the bulk sample, it is easy to see the sample, the dyes used are the same, and there is no "jump light" phenomenon. Generally, the color light is between the two, the gray card is above grade 4, and △E<1 (the internal control standard is generally △E<0.8), which will be recognized by customers.

The batch difference is controlled above the gray card level 4, the left, middle and right color difference is controlled above the 4-5 grade, and the batch difference △E<1 (within 0.8 of the internal control). When choosing dyes, try to use dyes that are consistent with the sample. Adjusting the color light, the newly added dye may cause the phenomenon of "jumping lights". When the large sample and the confirmation sample have obvious "jumping lights", there will be the risk of rejection of the large product, which will bring economic losses and reduced reputation to the enterprise. For example, when commonly used dyes with reversed spectrum, such as: turquoise blue, shihlin RB yuan, B green, T green, R red, etc. are added as dyes, they should be handled with care, and check whether there are serious "jump lights" under each light source. If there is, it cannot be added.

When re-ordering and replenishing orders, generally, the head cylinder confirmation sample is used as the benchmark to shift to the original and confirmed samples, so as to keep the color and light of the whole batch consistent, but sometimes when customers insist on using the original or confirmed samples as the benchmark, the color and light direction of large-scale samples must be considered. .

Post-finishing has an impact on the shade, and the color changes for different shades. Therefore, after dyeing and lofting, the samples in the post-finishing process should be adjusted after dyeing to meet customer requirements.