Description

>Post processing
Little post processing is usually required, the finish is achieved by dressing and texturing the master part before casting the tool. After casting the part there is only the feed and riser removal, although in some very colour critical conditions the parts are sometimes painted. (usually this is a colour pigment added to the resin)

The process steps can be summarised as
1. Manufacture a master part and dress to achieve the required aesthetics
2. Ensure the master part is clean and sealed (some materials will react with the silicone)
3. Establish a parting line and apply coloured tape around the it
4. Construct a casting frame and after attaching a feed and risers, suspend the master part in the casting frame
5. Degass the silicone and pour into the casting frame, degassing the cast tool again to remove any entrained air and then leaving to cure
6. When fully cured, remove the casting frame and cut open the silicone to the coloured tape / parting line
7. The master model can now be removed, the tool reassembled, taped together and sent for casting