Laundry factory will use a lot of washing powder for washing linen, so choose a good washing powder, for whether the quality of linen washing to play a key role in the highest. But perhaps the general laundry factory will not have the identification of washing powder testing equipment, then must rely on experience or actual use of the process of observation to analyze the identification. So how to distinguish the quality of washing powder is good or bad? The following Jie Shi to share with you this knowledge.

1. Appearance

Good quality washing powder, particles (powder) are relatively clear, uniform, good fluidity, white appearance, bright (dyeing powder).

2. PH value

The PH value of the washing powder solution can be determined by pH test paper or pH meter. The PH value of the detergent dedicated to silk wool should be 7-7.5, and the PH value of the cloth detergent should be 9.5-11.

3. Detergency

Detergency is an important indicator to measure the performance of washing powder. The rationality of washing powder formula is directly related to its detergency. The formula of washing powder produced by various manufacturers is different. They generally do not provide formula. As the user of washing powder, it is difficult to identify the advantages and disadvantages of washing powder by analyzing the rationality of its formula. The manufacturer provides the usage and usage conditions of its products. Then the washing factory can analyze whether these two data are reasonable and a series of indicators, briefly as follows:

1) Good quality washing powder has reasonable formula and excellent material selection. In the main washing process, when the water level of the washing machine is low and the dosage of washing powder is 1% of the washing liquid concentration, there should be no unclean rate for washing light-scale fabrics. When the washing liquid concentration is 2%, it should be matched with appropriate bleaching process. It is reasonable for washing medium and heavy dirt and the unclean rate of fabrics below 5%.

2) For good quality washing powder, there should be no peculiar smell after the fabric is washed. If the white fabric is observed under natural light, it should have a bright feeling, and the color fabric should have a bright feeling.

3) In the standard dosage, after the use temperature is met, the foam height should not be greater than 14cm.

4) The pH value of the washing powder solution is in the range of 9.5-11.

5) over water situation, after washing the fabric with standard usage, after using high water level and reasonable water temperature time for 3-4 times over water, the PH value of the washed fabric is reasonable in 7-7.5.

6) Use cost: compare the use amount of washing powder under the same washing conditions. For example, when washing fabrics with similar dirt degree and equal weight for the same type of washing machine and the same water level, 6.8 yuan per kilogram of washing powder A and 5.6 yuan per kilogram of washing powder B, then good washing effect can be achieved if 500 grams of washing powder A and 700 grams of washing powder B are 500, the unclean rate is only 3.4 yuan in grams and 3.92 yuan in 700 grams of washing powder B. Thus, it can be seen that the formula of washing powder A should be more reasonable than that of washing powder B, and the usage amount is less than that of washing powder B, but the same effect is achieved. Although washing powder B is cheaper on the surface, the usage amount is too large, and the cost is also increased.

7) washing fabric whiteness and decontamination stability, the use of a variety of washing powder washing machine several times of white fabric, generally can not see the whiteness change and decontamination stability, usually for the same piece or the same batch of fabric, after 30-40 times of washing, can be compared with some samples can be concluded.