After several visits to nearby cathedrals, I have taken a bit of an interest in heraldry. I’ve made two cushions – which you can see on my other blog T4mworkshops.wordpress.com – but was also keen to do something in glass.
I’d recently got some copper foil so thought I’d go for the rampant lion design.
For this tile I downloaded a royalty-free lion emblem from the internet and printed it out at the right size (to fit comfortable on a 4″ piece of glass). I then taped it to the copper foil and cut out both with a scalpel.
I then flattened it out with the rounded edge of a pencil and laid on a 4″ piece of 2mm glass. I had to put a few dots of PVA on the back to stop it moving around. I then overlaid it with a 4″ piece of 3mm tekta glass.
And I think therein lies the problem. I remember reading in one of my books that it isn’t a good idea to mix different thicknesses in the same piece and I think that may be why this piece – when cooked – has pulled in a bit on the edges between the corners.
The second piece only came about because I didn’t want to throw away the negative piece of copper sheet I was left with after cutting out the first lion. So I laid it on a piece of opaque yellow 2mm glass and covered it with a precut piece of 2mm clear glass.
This appears to have remained much squarer but has also pulled in equally all round! I know this because, despite leaving a 2mm border between the copper sheet and the edge of the glass, there is a slight rough metal edge all round. I quite liked the crushed silk look that the copper has developed after cooking but there are a lot of large air bubbles on the back.
To fuse these tiles I used an automatic glassfire programme on full fuse and slow firing (as I had my daughter’s uni project in there as well).
I’m enjoying my kiln but have not yet been brave enough to write my own programs. I intend to try making some tiles out of the ton of wine bottles we accumulated over Christmas but have read that they require a high firing temperature to rid them of their impurities and lose that sandy look.