What to do when the color of Chinese painting and watercolor dries?

It is best not to use the pigments when they are dry! ~~ gouache pigment if you add water to dissolve, it will take off the glue inside, can not paint gouache painting, but you can paint advertising paintings! (The advertisement paint sold on the market is the gouache paint that has been removed from the glue) ~~ Chinese painting pigments are generally used more economically, most of the tubes bought, if it is dry, do not want to still fall off the words, do the usual practice brush is perfectly fine! ~~

Gouache paint bottles, buy when you buy the top layer of glue, so that the preservation of time can be longer, after use, tighten the lid, placed in a cool place away from the light! ~~ color mixing box of pigments, after each use, spray bottle spray some water, pay attention not to spray too much, with a wet towel over the pigments, or sponge dipped in water in the space, and then cover the box lid! ~~