Today I am isolating a section for the mother mold – also called master mold but what a mother of a job it is!!!!
Imagine if I just pulled the rubber from the piece now, how would I keep it stable enough to pour something into? Thus the mother mold. (Please note: this is my method and by supplying this information, I do not wish to infringe upon styles used by others.)
What you must first remember is that it is made of a heavy non flexible material – I use plastic some use plaster. It will not come off if you apply it around corners so you must divide your sections for easy removal. Here I’m using putty which is not easily stuck to silicone but eventually you can tool it to stay.
I make the putty wall slightly higher to act as a flange to attach any other plastic sections and I will brush the plastic up as high as necessary for clamps or screws or whatever you will use to later adjoin the plastic pieces..
You must apply some type of mold release the the abutments of the plastic as well as the table or you will never get it off – ever!!!
This is the easy part, just wait til the inside!!!
I will add to this blog on this page as the day progresses so keep coming back to check for new pictures.
90 minutes later, the plastic paste is dry and I can remove the putty and the next application will butt up against the hardened plastic – remember the mold release!!!!!
Left side is plastic, right side is still the putty – hard to tell with the similar color