What is osmosis?

On the fabric of the combination of depth and depth (including white), the dye in the dark part flows to the light part or the white part.The cause of the problem is the following two possibilities: A and B. If the new product cannot be used for the reappearance test, the cause can be speculated to some extent in the following order.

A has retained the dye on the fabric due to the insufficient soaping after dyeing.
It can be predicted by the wet color fastness test (water resistance, perspiration resistance, colorization test, etc.).
B dye is fixed on the fabric after dyeing treatment. The dyed products that have no colorization during the prior inspection are affected by the moisture in the atmosphere, and the chemical bond between fiber and dye is dissolved (hydrolyzed).
It is difficult to predict by wet color fastness test.
The reason is that the reactive dyes used in the printing process will hydrolyze over time, so the color seepage occurred under the influence of the water during washing.

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