... photo etching resist(mask) NameERL-1 photoresistColorBlueViscosity(VT-04E,No.3)12-14PS, 60-100SScreen mesh100-250meshCoating thickness0.03 to 0 ... /cm2, level 7-9Film hardness after exposure2HResolution+/-0.02mmDeveloping3% Sodium carbonate at 30°C,2kg/cm2 pressureStripping5% Caustic sodium, >50°C ...