UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hejuru
A day
Amabwiriza
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.
Ibikoresho by'iyi ntambwe:
Ibice by'ikirahure cya soda n'ishwagara1 kg
Ogisidi ya kobalti1 g
Okiside y'umuringa30 gIbikoresho bikenewe:
Iminzani ya Digitale yo mu Gikoni2
2
Melt
Melt
Melt the cullet and colourant together in a crucible in the kiln until the glass is fluid and evenly coloured.
Ibikoresho bikenewe:
Itanura
Ikirahure cy'Ibumba Rirwanya Umuriro
Amakoro y'Icyombo Gishongesha
Uturindantoki two gukomeza ibyuma
Amadarubindi y'umutekano3
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.
Ibikoresho bikenewe:
Inkoni ya pontile
Marver (urupapuro rwo kuzunguza icyuma cy'ikirahure)ItanuraUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano4
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.
Ibikoresho bikenewe:
Inkoni ya pontileUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano5
5
Break into lengths
Break into lengths
When cold, score with a file and snap into lengths of 10 to 15 cm.
Ibikoresho bikenewe:
Ikariso ry'IcyumaAmadarubindi y'umutekano6
6
Colourant and rod length
Colourant and rod length
Gupakira ikaye ya Jupyter…
Ibikoresho
3- Umwanya
- Umwanya
- Umwanya
Ibikoresho bikenewe
9- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
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