Following on from a fusing run, I slumped the results to make a shallow dish and 2 tea light holders.
The dish slumped perfectly, which is not a great surprise, since it is a shallow run and so has nowhere to go other than into the mould. I think we have perfected this design now.
The key setting was 725 degrees for 30 minutes, which I have adjusted following a few earlier slumping runs to the point where I have a setting that appears to make good shallow dishes and deeper slumping for tea lights.
However, next we move on to a problem with the slumping of the tea light holders. The holder at the front of the kiln didn’t slump enough, it has a rounded base that didn’t reach the kiln floor. Worse was the tea light at the back, as can be seen in the detail pictures below, it slumped unevenly, sinking down unevenly on one side and not the other.
I am a little mystified. I have a few theories, against which I would welcome a critique from those more experienced in fused glass work.
- I have a Kilncare kiln, which is supposed to have (and on fusing runs has proved to have) a good even temperature across the kiln. But is the slumping process too sensitive to run successfully towards the corner. Does this explain why the inside of the top tea light has melted more?
- But, if this is the case then why has the bottom tea light slumped evenly, but not enough, suggesting that it wasn’t hot enough?
- Or could it be that my vermiculite mould is too rough to allow the glass to ‘slide’ down and has caught it on one side? I have checked and this doesn’t seem to be the case, unless again it is extremely sensitive.
If this wasn’t the same setting that was successfully used for the last tea light, I would think that I need to increase the temperature by 5-10 degrees and move the tea lights to be more central in the kiln.
Or am I missing something? Any ideas welcome.