Making Silicon Moulds & Rubber Stamps

Method One: Cornflour
Ingredients:
Wheaten Cornflour 300-400g
Parfix – clear silicone sealant 300g. (Bunnings Hardware)
The Ratio is generally 1:1 but if this is not the case (as I find sometimes it depends on the cornflours absorption rate) and it is still sticky just keep adding Cornflour.
Makes: 461g or 190mm x 240mm sheet

Method:
1. Slowly mix Cornflour into silicon.
2. Wearing gloves initially once mixed in and once it has reached a texture where it is not completely sticking to your hands.
3. Remove gloves and continue to work in your hands until a soft smooth paste is achieved. A paste that does not crack readily when pressure is added.
Mold
1. Press-in or over depending on the object you want to make a mold of.
2. Leave for around an hour and then remove the object


Stamp
I work on a well-floured granite slab, using a rolling pin (unmarked, as indentations, will leave a mark in the silicone rubber)
1. Roll out Silicone Rubber into the size you would like.
2. Cut to size block you require and leave to cure for 24 hours





Method Two: Water Method for Mold Making
Ingredients:
Parfix – clear silicone sealant. (Bunnings Hardware)
Water
Dish wash liquid
Method:
1. Fill a bowl with water
2. Add dish was detergent a decent amount
3. Decant silicon let stand in detergent water for 10 minutes
4. Slowly work the silicon in the detergent water, it will gradually become not excessively sticky
5. Remove from water, lather hand and in turn the silicon in dish wash.
6. Continue to work the silicon, it will become less tacky.
7. Leave in the open air for 5-10 minutes
8. Press-in or over depending on the object you want to make a mold of.
9. Remove object after 1 hour