How to control color? In the production process of colored spinning, color control is the key to quality control. If the color of the yarn does not meet the customer’s requirements, no matter how good the quality indicators are, it is of no use. In the process of improving the level of proofing and color matching, we have summarized a set of methods: let’s take a look!
1 Create your own color card
We have created our own color cards and are constantly enriching them. Each color series has a color number every 10%, and a color series has at least 10 color numbers. The yarn is spun into cloth and made into a color card. After receiving the sample, first compare it with the color card, visually check which color number is close to it, add or subtract about 5% according to its composition, and make three small samples for quick test and comparison. During the spinning process, semi-finished products can also be compared, and any differences can be corrected in a timely manner. In order to ensure color accuracy, the count must also be similar to the incoming sample.
Also pay attention to the consistency between the proofing machine and the production of large quantities of goods. Not only the machine model must be consistent from front to back for proofing and bulk goods, but also the special equipment, equipment status, and process loading must be as consistent as possible.
2 Control of color proofing
1. Darkroom Light Box Settings
The venue for color viewing requires that the samples be viewed in a darkroom light box. (1) The darkroom is 3 meters high and must be well ventilated and light-shielded (no light sources other than light boxes can enter). (2) The light boxes are designed to be 6 square meters each in the darkroom. The light boxes are placed in a row or back to back, and can be placed face to face, otherwise the light sources will affect each other.
2. Management of proofing and sample standard storage
(1) The tables, cabinets, and doors of the proofing room should be uniform silver gray, and the standard sample cabinet should not be placed in a place where the humidity is too high room, otherwise it will cause discoloration of the standard sample. (2) For the management of files such as standard samples, colored cotton, bobbins, cones, cloth samples, etc., there must be sufficient space for displaying cabinets, and designated personnel for safekeeping and filing. (3) The location and environment where the sample standards are stored should keep the temperature and humidity relatively stable.
3 Control the process and raw materials
(1) Understand Order Information Requirements. (2) When color matching, you must look straight at the fabric sample and stack the fabric samples in 2-4 layers respectively to avoid using a single layer for color matching. (3) After the proofing is successful, the curing process, color ratio, raw material batch number and rework ratio must be cured; each incoming material must be inspected for differences with the original production batch, not only the color and light, but also the internal quality, and problems must be discovered in a timely manner Adjust controls. (4) When mixing ingredients with multiple marks, the proportion of raw materials for each mark must be accurately calculated and accurately controlled.
4 When color matching Things to note
In the process of color matching, you must constantly ask yourself the following questions to ensure the accuracy of color matching.
(1) Is the color difference within the control range? (2) Is the color matching environment standard? (3) Are the count and fabric the same?
Wait. If it is a variety produced for the first time, communication with various departments such as operations, quality and R&D must be done well.
5 Production Process Control
The batches of color spinning orders are small, ranging from several tons to hundreds of kilograms. Changes are frequent. It only takes a few days from input to completion, and the delivery time is very short. In order to improve For production efficiency, each process must calculate the number of units (especially the number of spinning units), and strictly control the length of drawing and roving. The more accurate the better. Drawing, roving and spun yarn are made from top to bottom, which can not only ensure the production rate but also save time.
Use and management of 6-turn flowers
Every time you spin a variety, Reserve 50 kilograms of raw materials mixed in proportion for later use. During production, the pre-spun yarn can be spun out at any time for reuse. After the cotton rolls are used up, all the yarn is mixed with the raw materials reserved in advance and rolled into rolled strips, which are merged with the normal raw sliver in the drawing lane. When using, pay attention to the fact that the backlash content of the combined cooked strips cannot exceed 10%, which requires that the number of backlashes must be controlled, otherwise it will affect the color and quality indicators of the finished yarn. After spinning, the remaining back flowers are packaged and labeled with the ingredients. The next time there is a variety with a similar color series, it can be used in the color matching test spinning. This can reduce waste and improve efficiency.
7 Product Protection
To produce dyed yarn, we must first solve the problem of product Protection issues. If possible, it is best to separate production areas according to color series to avoid mutual contamination during the production process. If the equipment is all in one area, flexible and easy-to-disassemble isolation devices or items must be built between the varieties. When arranging the varieties, the colors of adjacent machines should also be considered. Those with similar colors should be placed on adjacent machines. If the colors are different, Large ones should be arranged as far apart as possible to prevent mutual contamination. During transportation, they must also be tightly packed, covered, and protected.
8 Conclusion
The management of colored yarn is more difficult than that of white yarn , first of all, the proportion of each ingredient must be controlled accurately, and secondly, the amount of waste in each process must be strictly controlled. The cleaning of containers and machines, and product protection during transportation must be strictly controlled.��Basic management requirements are also more stringent, otherwise quality problems will easily occur. </p
