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How to Make a Silicon Rubber Pad

Author:Ivan Zhang
Ink is transferred from the cave of pad plate to the substrate by a silicon rubber pad in the process of pad printing. Please choose pad figure and hardness according to the substrate and printing quality. Know how to make a pad as below:        
Pouring mixing emulsion with silicon rubber and silicon oil as 100:20-50 percent into a clean plastic cup. Beat up it  uniformity with a beating machine. 
Cleaning the plastic pad module and put it on the table.
Adding 3-5 gram harder to mix emulsion and put in a vacuum glass cover of motor machine. Start the machine for 2-4 minutes till the air in the  mixing emulsions completely removed.

4.Pouring & Covering
Taking out mixing emulsion and pouring into pad module. Cover a wooden plate on it.
5. Solidifying
Solidification speed is related with the environment temperature, higher temperature,faster solidification speed. Otherwise, in order to expedite solidification speed, please put more  hardener into mixing emulsion.
6.Optimizing Hardness       
Complete solidification requires 2-5 hours. Adjust the percentage of silicon oil can adjust the the hardness of rubber pad. Less percentage of silicon oil will produce a harder pad. When you increase the percentage of silicon pad, please add corresponding percentage of hardener. But, too much percentage of silicon oil will affect pad quality negatively