How to make the Pad plate
As you know , the pad plate is importance in the pad printing system . in EURO ,Amicain ,the person use the plexiglas plate amost ,in ASIA ,the person use the steel plate most . the steel palte pricce Is low and competitive more than the plexglas plate .the steel plate
steady and safe in operation and durability. was easy to disassemble and maintain.
The following introduce how to make the steel plate : Making pad plate is first step to begin know pad printing technology. and pad plate item :
A : Thick steel plate
Opening ink dish with the thick steel plate. Include size 3″*4″,;4 ″*4″,4″*6″,4″*8″*4″″all thickness is 10 mm.
B : thiner stel plate
Sealed (close) ink cup with the thin steel plate ,include size 100*230mm ,100*260mm. 100*280mm. Thickness is 0.25mm, 0.3mm, 0.5mm, 1.0mm.
The thick steel plate and thin steel plate process as same .it is only different process the Etch time of thin steel plate than the thick steel plate .
Ⅰ Output film: Output film according to computer document provided by customer with laser output machine. You also ask expert output center to make film for you, most of pad film is positive.
Ⅱ Coating emulsion chemistry products :
a: Washing clean the steel plate with depurative.
b :Coating FUJI emulsion on the steel plate by hand. or dipping coating machine or spraying coating machine. .
note : some supply already coating emulsion with the steel plate.
Ⅲ Drying: put the steel plate with emulsion into drying closet at the temperature of 150℃ for 5-15 minute..
Ⅳ Exposure: put up the firm with glass press close the steel plate in the UV exposure machine for 30Sec –1minute.to exporsure .
Ⅴ Developing: Dipping pad plate into the jar full of FUJI developer liquid for several minutes till displaying hidden image on the surface of emulsion. Then blowing it and removing water by compress air gun.
Ⅵ. Etching by hand：Taking one brush dipped with etching liquid and brushing the hidden image 3-5 times so that hidden image completely display. Some factory have no etching machine, please continue taking brush to brush for 30-50 seconds. Because etching operation only by hand, correct depth of pad plate only by experience.
Ⅶ Etching by machine: Precision etching and half-tone drawing must be use spraying etching machine. Pad plate put into etching machine and is adsorbed by magnet installed on the frame within PVC etching box. Setting etching time and start etching machine till the machine stop automatically.
Ⅷ. Blowing: Take compress air gun to blow pad plate and confirm having no remain etching liquid.
Measure depth: Standard depth is about 19-23 um. Fact depth must be according to customer request. More long etching time and deeper. Measure fact depth with depth measure meter.
10. Package: Removing emulsion on the pad plate by clean solvent。 Clean it by clothes then spraying anti- rustiness and put into PA plastics bag. Pad plate has been finished!
