As for water sentive pigment, there are two ways of color-changing:

1.White - transparent - show background color

After printing, it shows white color on the surface when it’s dry.
When the surface is wet, the printed area becomes transparent, and the background color shows up. It is mostly used for umbrella, raincoat, drawing book, toys, handicrafts, etc.
such as the following picture:

About this change type, we have 2 states of water sensitive pigment, powder and liquid ink.
The added ratio of 10-15%, can be mixed with polyurethane resin use.
It does not need to add any resin, can be used directly on the cloth, if the drum is opened, the ink becomes dry, please add some distilled water after mixing.

2.Colorless  - show hiding pattern

After printing, the surface shows no pattern when it is dry. When the surface is wet, the hiding pattern shows up. It is mostly used for watermark printing on fabrics.
Such as the following picture:

It does not need to add any resin, can be used directly on the cloth.After the ink is used on the cloth, please put the cloth over 150 to 170 degrees, the time is about 1 minute to a minute and a half, can increase the firmness of the powder in water.