Printing and dyeing tips │8 major factors affect the color one-time success rate and solutions [production practice experience]

The factors that affect the success rate of one-time dyeing are:

First, the effect of dyes:

1, different batches of dyes have a bad appraisal, every time you enter the dye to test the batch difference;

2. Storehouse dyes are improperly stored and managed, resulting in dye ups and cross-talk;

3. Improper management of mother liquor life in the laboratory, not replaced on time;

4. The concentration of the dilution ratio of the mother liquor in the laboratory is poor, and the manual pipette is not properly controlled;

5. Select dyes with close compatibility. In the process of color matching, there is a phenomenon of actual dyeing, resulting in color difference before and after.

Second, the influence of additives:

1, pay attention to the difference of different batches of additives, in addition, attention to stirring when taking the barrel of auxiliary agent;

2. The use of different additives will cause the change of shade and the final fixing amount. Attention should be paid to the control of the amount of additives between laboratory sample and workshop production.

Third, the color difference caused by the gray fabric :

1. It is necessary to match the grey cloths produced by the large goods with the batches produced by large goods.

2. Samples of gray fabrics are stored for a long time, and are affected by moisture or gas, resulting in large and small samples. Laboratory fabrics should be changed frequently and wrapped in a film, which is completely separated from the dyeing materials in the laboratory and protected from the influence of bad gases.

Fourth, the process conditions caused by color:

1. Workshop production must strictly comply with the process issued by the laboratory.

2. The bath ratio, the dyeing (incubation) time, and the dyeing pressure have an important influence on the coloration. Dyeing bath ratio is different, the difference of shade is obvious. When the dyeing (incubation) time is prolonged at a certain temperature, the dye uptake will increase significantly.

Fifth, finishing the impact of color:

1, the laboratory and the workshop after finishing are not uniform, different finishing processes have different degrees of influence on shade. For example, the temperature control, the use of fixing agents, will seriously affect the color light results.

2. There are differences between the laboratory and the workshop finishing, and no corresponding adjustment has been made.

Sixth, the impact of water quality on color:

The water used to make the sample must be consistent with the quality of the water used in the large production.

Water quality in different periods may contain differences in impurity components and contents, pH value and hardness. These differences will also cause color differences. For light and white color, soft water should be used as much as possible to reduce the impact of water quality.

7. Human influence:

The employee’s operation did not follow the rules. Here mainly refers to the need to cultivate the staff's sense of responsibility and conscience, while maintaining the stability of the staff (proficiency level related to experience and technology accumulation, minimizing errors). It involves all aspects of human resource management issues.

Eight, machinery and equipment impact:

1. Weighing accuracy is not enough. Weighing scales used by laboratories for a long time have poor accuracy, especially for small samples. The effect of errors on large samples is even more pronounced.

2, dye cylinder instrument is not accurate instructions. Including the malfunction of the instrument, the instrument did not correct as required, and the pressure leaked.

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