The medical community uses a process that may work here:
- place silicone in a container that allows for machining
- fill remainder of container with dry ice
- add acetone to dish
This may maintain the silicone at a low enough temperature for drilling.
Be sure to use a slow helix tool.
This may provide a considerably longer working time than immercing in
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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