IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Coloured Glass Rod: Cullet Coloured with Cobalt or Copper, Pulled Between Two Punties
Lampworkers' rods were first drawn by hand from the furnace. Melt soda-lime cullet with a little cobalt oxide for blue or copper oxide for turquoise, take a gather on a punty, roll it on the marver, then two people pull it out between two punties to about pencil thickness. It cools in minutes; break it into short lengths.
The picture: our diagram of the pull.
Ilọsíwájú
A day
Ìlànà
1
1
Weigh the batch
Weigh the batch
Weigh clean cullet and the colourant: 0.25 to 1 g cobalt oxide per kg for blue, or 20 to 30 g copper oxide per kg for turquoise.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Àwọn ẹ̀yà dígí soda-ẹfun1 kg
Kobalti ọ́ksáìdì1 g
Oxide Bàbà30 gÀwọn irinṣẹ́ tí a nílò:
Òṣùwọ̀n Díjítà Ilé Ìdáná2
2
Melt
Melt
Melt the cullet and colourant together in a crucible in the kiln until the glass is fluid and evenly coloured.
Àwọn irinṣẹ́ tí a nílò:
Ìléru Ìsun
Ìkòkò Amọ̀ Tí Ń Kojú Iná
Ẹmú Ìkòkò Ìyọ́
Ìbọ̀wọ́ wẹ́lídìn
Gíláàsì ààbò3
3
Gather and marver
Gather and marver
Take a gather on the end of a punty, roll it on the marver into a short cylinder, and reheat it until evenly soft.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀pá pontil
Marver (pẹpẹ ìyí ti dígí)Ìléru ÌsunÌbọ̀wọ́ wẹ́lídìnGíláàsì ààbò4
4
Pull the rod
Pull the rod
A helper presses a second punty onto the free end. Walk apart, keeping the rod straight, until it is about pencil thick. Lay it down to cool.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀pá pontilÌbọ̀wọ́ wẹ́lídìnGíláàsì ààbò5
5
Break into lengths
Break into lengths
When cold, score with a file and snap into lengths of 10 to 15 cm.
Àwọn irinṣẹ́ tí a nílò:
Ìfá IrinGíláàsì ààbò6
6
Colourant and rod length
Colourant and rod length
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
3- Àyè
- Àyè
- 30 gÀyè
Ìtọ́nisọ́nà yìí ń ṣe
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