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Gold Sheet: Fine Gold Cast Flat, Rolled and Annealed, Gee
Fine gold stretches further under the rolls than any other metal (Gee, The Goldsmith's Handbook). Cast it as a broad, thin bar, file the edges clean, and roll it, closing the rolls a little each pass. When it hardens, anneal it and roll on, down to 0.005 inch.
The picture: a piece of ancient gold sheet (Portable Antiquities Scheme, Harriet Louth, Wikimedia Commons, CC BY-SA 4.0).
Ophakathi
1 day
Imiyalelo
1
1
Cast a broad, thin bar
Cast a broad, thin bar
Melt the fine gold in a crucible and pour it into the ingot mould as a broad, thin bar: the bigger the surface, the less waste at the edges.
Izinto zokwakha zalesi sinyathelo:
Igolide31 gAmathuluzi adingekayo:
Imbiza Yokuncibilikisa
Isibani Se-propane
Udlawu Lwesitsha Sokuncibilikisa
Isikhunta sokuthela insimbi2
2
Weigh and file
Weigh and file
Weigh the bar to see what was lost in melting. File the edges and corners clean: loose bits would be lost in the rolling.
Amathuluzi adingekayo:
Isikali sesilinganiso
Isethi Yamafayela Amancane3
3
Roll, closing a little each pass
Roll, closing a little each pass
Pass the bar through the rolls again and again, closing them a little each time.
Amathuluzi adingekayo:
Umshini wokugingqa insimbi4
4
Anneal when it hardens
Anneal when it hardens
When the gold turns hard, anneal it: lay it on an iron sheet in the kiln and heat it to soften it.
Amathuluzi adingekayo:
Isithando
Ishidi lensimbi (elikhandiwe)Udlawu Lwesitsha Sokuncibilikisa5
5
Roll down to 0.005 inch
Roll down to 0.005 inch
Roll and anneal in turn until the sheet measures 0.005 inch, then weigh it again.
Amathuluzi adingekayo:
Umshini wokugingqa insimbi
I-MicrometerIsikali sesilinganisoAmathuluzi Adingekayo
10- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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