Wednesday, 10 December 2014

Problems experienced when making moulds

During the mold making process I experienced many problems. The beginning part creating the positive silicone mold went well and I didn't experience anything problematic there. When making the negative I experienced a lot of things that made me gain more knowledge about the mold making process. I made the negative mold multiple times as I found that it didn't set in my positive mold. There could be many factors that contributed to this:

- The petrolease may not have been dry properly. Ensure that this is completley matte before applying your accetone and baldez mix.
- The acetone and baldez mix may not have been dry properly before adding the silicone mixture. The inner mould could have been swamped with acetone and baldez which strips away at the silicone. If this is not dry it will not create the correct base which allows the silicone to dry. 
- The silicone mixture itself may be contaminted. This is why is is so important to constantly change gloves so that nothing can become contaminated. My box where I kept all the products was contaminated by parts of silicone which meant my cups and wooden sticks were also contaminated. It takes a small part of either silicones to begin activation. A grain of anything can ruin this. Therefore lids should be kept on everything at all times, gloves need to be changed constantly. The work surface should be changed and cleaned after each negative mold is made.
- The silicone mixture may not have been dry. It can take a long time for the mold to set in the positive mold. Therefore you need to be patient and allow some time for this to fully set. Make sure it is on a flat surface to allow even drying out. 
- The mold may not work if it is removed from the positive mold too soon, which is what happened to me multiple times.


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