For the love of silver…for the love of life!!

Posts tagged ‘Siligum’

Day 8 – Making Moulds for Precious Metal Clay casts.

I think I might have found a quick way for transferring my posts for Thing-a-Day from Posterous to here…I hope this works!!…

Day 8 – Making moulds for Precious Metal Clay casts.
Last week I received a commission to make a pair of silver earrings for a lady who wanted to have a pair of earrings featuring shells. She wasn’t 100% sure what she wanted – except that she didn’t want them to be very long and she wanted shells…preferably pink shells.

Well, I scoured the internet trying to find somewhere that I could get tiny pink shells that might work well for this particular commission – but to no avail. So I phoned the lady back and asked if she would be willing to let me experiment a bit with a few ideas before coming up with a final design. I also asked if she would consider having silver shells instead of real seashells. She seemed to be very happy to let me play! And so this commission is now officially part of ‘Thing-a-Day’.

It isn’t the first time that I have taken moulds from shells and cast precious metal clay silver shells from them – and they always work out pretty well – so I was quite confident to make the 2 piece moulds. I use a product called Siligum, manufactured by Gedeo to create the mould and as it dries to a flexible material there is no problem with having undercuts in the shape to be cast. It is really simple to do and the moulding material sets within 5 minutes.

I have cast 2 different shell types (so she can have a choice) and both of them are really quite small – measuring about 1.8cm (about 3/4″), but when the PMC silver has been fired in the kiln it will shrink by about 10% so making the shells a little smaller still. So I think these will ultimately be a good size for a pair of earrings.

I have cast one shell of each type today and after drying them have fettled down the inevitable seam line where the 2 halves of the mould joined but otherwise have left them unfinished.

Tomorrow, I will tidy them up a bit further and, if it is not too cold to work in my ‘Studio’ shed, I will fire them and possibly start experimenting with enamelling them to see if I can get a pink hue. I have a lot of blue and green enamels as these are my favourite colours and they are fairly consistent at producing good results…I tend to steer clear of red colours though, as they never work very well for me. So – although I don’t actually have a pink enamel, I believe that flux enamel has a bit of a peachy pink cast to it when fired onto fine silver..so I will give that a go!

I’m really quite excited! Roll on tomorrow!!

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