Color plates usually have several basic coatings

To achieve the anti-corrosion effect, each single side of the substrate should be coated with at least three isolation film layers, which are chemical conversion coating, bottom coating and surface coating.The colour besmear line in the early days had besmear 2 only, namely have coating of a chemical conversion coating and coating of also bottom also face only coating, but because anticorrosive effect is not good, now colour besmear line is besmear normally 3 or above, some home appliance board is besmear according to actual need even 4 or 5.This is why the following sections introduced the color coating unit will have two coating and two drying, three coating and three drying, four coating and four drying and other technical processes, generally speaking, the color coating line is used for printing color coating board production.