Deep Investigation: What Is The Standard Of Dyes Purchased By Printing And Dyeing Factories?

At the end of the year, when printing and dyeing factories are preparing for dyes and auxiliaries, what are the expectations and requirements of printing and dyeing factories for dyestuff products? Or what are the standards for printing and dyeing factories to purchase dyes? We have learned some information from several printing and dyeing factories, providing a simple solution for printing and dyeing factories and dye auxiliaries.

Choosing dyes is easy to operate.

1. the dyes selected should meet the needs of the existing production processes. For printing and dyeing enterprises, the production process is mostly mature technology, long-term process, raw materials and other conditions are basically fixed, can not be arbitrarily changed, so as not to affect the quality of production.

2., the cost is low. This low cost requirement is also put forward under the condition of ensuring normal production.

3. color matching is relatively simple. The color matching of dyes has a great influence on subsequent processing. If one color can be used with two dyes to finish matching, three must not be used. As we all know, using fewer varieties of dyes to match colors, the accuracy rate will be higher, the adjustment will be simpler, and the dye with relatively simple color can also improve the production efficiency.

Environmental issues and quality requirements

1. environmental protection. Due to the increasingly stringent technical requirements of foreign countries, the new technical standards and requirements have been put on the agenda. In addition, the certificate of safe use of the dyes and auxiliaries and the inspection reports of prohibited chemicals have been added to the factory.

2. the problem of chromatic aberration. As we all know, the printing and dyeing mill has to face the problem of chromatic aberration every day, including the color difference, the color difference between sides, the color difference before and after, and the positive and negative chromatic aberration, including the stability of semi products, as well as the compatibility of dyes, the technological feasibility of dyes, the fine workmanship of workers, and the quality control system of enterprises. However, the problem of chromatic aberration caused by the difference of dye characteristics is not allowed to be neglected. Some dye factories are lack of cooperation with printing and dyeing factories. They are faced with many difficulties in dyestuff compatibility and chromatism.

3. fastness. Nowadays, the requirements of the guests are getting higher and higher. Among them, the sunlight fastness has become the general requirement of the guests. Therefore, the printing and dyeing factories urgently need the introduction of dyes with various indexes.

At the same time, the middle and dark color dry friction requirements of more than 4, wet rub requirements of 3~4 levels, alkaline and acid sweat fastness requirements of 4 levels, chlorine bleaching, non chlorine bleaching fastness 4 grade, water stain fastness 4 level, etc., this makes printing and dyeing factory need to understand the dye and various finishing factors on the dyeing results, increased the difficulty of processing, but if there is no high standard requirements of products, there is no room for enterprise development. Therefore, the printing and dyeing factory requires the upstream and downstream to jointly develop and develop the market. On the one hand, the printing and dyeing plant needs strict process and fine operation. At the same time, all dyeing and finishing plants are required to make a new round of development of the products to meet the customers' ultimate needs and achieve a win-win situation.

4. the completion of internal indicators. At present, the standards of customers are becoming more and more perfect, and more and more internal quality indicators are required. It can be said that whether printing and dyeing products can meet the standards is a basic condition for receiving orders. In addition to normal indicators, many new indicators now involve cotton, spinning, weaving, printing and dyeing processes, dye auxiliaries, and so on. For example, high strength indicators are just an obstacle to many high value-added products at present. High sunlight involves the materials used. High fastness involves dyes, printing and dyeing processes and auxiliaries. These problems can not be solved by one side's efforts, and the joint efforts of the upstream and downstream enterprises of printing and dyeing industry can make significant breakthroughs.

The right choice is the root.

At present, domestic dyes have some shortcomings. Some products with special requirements (including sun resistance, etc.) can not meet the requirements, the rate of improvement is not high (resulting in insufficient color depth), the solubility is not enough, and the individual products can not meet the requirements. In addition to the deficiencies in the quality and performance of these products, another aspect is that some dye companies still need to improve the concept of after-sales service. Large brands abroad are often launched in a group of products when they launch their products, while related technologies and after-sale services can follow up, while some domestic enterprises are lagging behind.

Three choice dyes

Regarding the purchase of dyestuffs, printing and dyeing enterprises say that the most important thing is the goods ratio is three, and the price performance of the products is better.

The same performance of products, of course, still choose the low price.

In addition, business credit is better.

The dye suppliers of the company are mostly "old relations" dyestuff manufacturers, all of which are established after years of communication. Faced with fierce competition and tremendous pressure to survive, many enterprises are reluctant to try to use new suppliers' products easily.

The biggest worry is that once the new product has problems and the dyeing effect is poor, the production efficiency will be affected.

Three criteria for dye purchasing

1. strength. The use of dyes is relatively high, and the problems such as wastewater and pollution are relatively easy to solve.

2. customer requirements. Customers are God. If customers have explicit requirements to use imported dyes or a brand of dye, the company will produce according to the requirements of customers. Generally speaking, domestic dyes can meet customers' requirements for fastness and so on.

3. stability of dyes. This is a very important aspect. The stability of dyes has a direct effect on the reproducibility of dyeing and the quality of dyeing.

In the process of understanding with some printing and dyeing factories, there are two aspects for printing and dyeing factories to purchase dyes, one is the reproducibility and compatibility of dyes. The reproducibility and compatibility of the dye lofting success rate will be higher, the production efficiency is relatively high, close to a successful dyeing; two is the color fastness after dyeing. This is also an important part of the quality of dyed products.

In conclusion, the dyeing and finishing plant mainly deals with several factors.

1. the performance of products, these properties should meet the needs of printing and dyeing processing.

2. economy. Now printing and dyeing enterprises are facing various pressures and reducing costs is a very important consideration.

3. operability of products. In short, the normal conditions of dyeing and finishing are relatively wide (such as temperature, P H, etc.), but not limited to very narrow conditions. If the product is very sensitive to the technological conditions, it will not be conducive to the quality assurance of mass production.