wolverine finished and primed

Masked and unmasked versions

moulding and casting

I wanted to improve the quality of my resin casting so I bought a 20 litre pressure pot from Airlesspro.

Initially there were some air leaks when I filled it up to 40psi using my small airbrush compressor.I discovered these by brushing on a soap solution and observing where the airbubbles were forming.

I tried to plug these up the best I could using silicone sealant but found I was still losing about 2 psi every hour.I think the leak may be coming from the rim where the lid sits on the container, Its not ideal but its still workable-just means I have to top the air pressure up every now and again making sure it kept between 35 and 40 psi.Its definitely worth it and makes a significant difference as illustrated by this photo of a silicone rubber mould-one made with a pressure pot and the other made without.Notice all the air bubbles in the uncompressed silicone mould.These cause 'dimples' in the resin cast. There are practically no air bubbles in the compressed mould,so no dimples.

As for the resin casting itself-well what a difference.

There are so many pinhole airbubbles in the uncompressed resin cast compared to almost none in the compressed one.These pinholes are invisible on the resin cast until you spray paint on them then they are revealed and you cant miss them! I used to use Tiranti's Biresin. I really like it and have always used it but because it cures so fast, there is no time to get it into the pot and compress it before it sets.So I have tried Smooth-cast 310 which has a longer pot life and demould time to allow me to pressurise it before it cures.

It seems fine but I dont like the smell of it.So after all that I managed to get out a protocast of Wolverine.

I still need to do a masked version aswell but I've run out of resin right now.