What is the alkali resistance of printing ink? What is the quality of offset printing?
The resistance of ink to alkaline substances is called alkali resistance of printing ink.
The alkali resistance of the ink depends mainly on the alkali resistance of the pigments and binders used.
In the offset printing process, effects on the quality of offset printing ink alkali resistance is mainly manifested in the following aspects: in the offset printing process, paper coating ink contact with alkaline, alkaline and affected by the surface plate is serious, could destroy the structure of ink, pigments and binders to offset imprinting fade decomposition. Or discoloration.
