Starting from the experiments done previously, I refined the technique to enamel them and to make the writing on them sharper I used a stiff brush to remove the glaze.
Experiments with the ceramics available in the laboratory took several factors into account:
- the time of the liquid cram in the mold (thickness)…
- the time left to dry before the piece is removed
- final translucency
These are the notes of the various drippings
1st time: 30 minutes waiting and 2 hours to dry.
After glaze dimensions:
base diameter:14,2 cm
Diameter of the hole: 7.5 cm (not regular)
2nd time: 18 minutes waiting and 3 hours to dry
Before glaze dimensions (biscuit):
base diameter: 15,5 cm
Diameter hole: 8.5 cm (not regular)
3rd time: 10 minutes waiting and 1 hour to dry.
open the mould the casting cone has detached by opening the mould.
4th time: 6 minutes waiting and 2 hours to dry.
5th time: 4 minutes waiting and 3 hours to dry (exploded into a thousand pieces)
The desired result arrived with the duration of 6 minutes, the light passes even if very weakly.
The experiment after 4 minutes led to the explosion of the piece while I was trying to renify some details almost dry.
With the arrival of the porcelain the process for this lamp has not changed but the effect of the piece fired at 1240 degrees is incredible. the light passes sharply and harmoniously from the thickness.