Sunday 23 October 2016

The Lizard

Finally finished the lizard. This is the resin cast primed.





The original was sculpted in homemade zen wax (grey) and homemade '360' wax (pink).

This is the first time I have used a different moulding process.It takes longer than my previous method (see Iron Man) but I think the extra effort is worth it because I was fed up with mis-alignment with casts and this method eliminates that problem.This is also the first time I have used 'keys' (the male and female parts that allow the pieces to register and lock together) Here are pics to show the moulding process
 First cut up the sculpture.And add the 'keys'
 Start to mould the tail.
 Starting to build up the first half using chavant NSP (medium)


 Finished with the chavant.

 Adding the all important registration marks that will ensure the two halves of the mould will lock together perfectly with no mis-alignment.I just used the end of a paintbrush and press it into the chavant.
 Pour the first half of silicone.
 Once the silicone is cured, I can begin to create the second half of the mould.
 Remove all the chavant and clean any remaining clay from the sculpture and silicone.Build the lego bricks back up.Brush vaseline onto the sculpture and most importantly onto the first half of the silicone mould.This is to ensure the second half of silicone will not adhere to the first half.You can use spray on mould release but a liberal brushing of vaseline is the failsafe.
 The two halves should come apart with no problem.Remove any remaining bits of the sculpture.
The resin cast will only need a simple seam line clean up.
Here are a few more moulding process pics.I ran out of the Tiranti silicone but had the Tomps silicone on hand ( the blue one).