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Soaking discoloration ink is divided into reversible discoloration ink, irreversible discoloration ink and irreversible pervasion ink.
　　1. The color of reversible discoloration ink disappears when subjected to water and would restore to the original color when the water has evaporated, the available color is white-transparency. It’s supposed to work with 350~420-point silk screen for creating a thicker layer of ink.
　　2. The color of irreversible discoloration ink changes from colored to colorless when subjected to water and wouldn’t restore to the original color any more. The available colors includes black-colorless, red-colorless, green-colorless and blue-colorless. It’s supposed to work with 350~420-point silk screen for creating a thinner layer of ink.
　　3. The colors of irreversible pervasion ink include red, yellow, blue, and green. It is for silkscreen only.