Ensuring the balance controlling of water and ink
During the offset print,uv ink shows weak polarity,the emulsion phenomenon appears if water and ink are not balanced well.which will cause ink film become non-transparent.then directly affect the transmittance of Ultraviolet,slowing down the UV ink curing speed further.as a result of that.the inside of ink film can not be cured entirely.the scratch and peeling comes out on the surface when the printed products are folded and rubbed together under this condition.