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Copper Foil: Sheet Rolled Thin with Anneals Between Passes
English
Lloyd Davis from London, UK (Wikimedia Commons) · CC BY-SA 2.0
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14. Ukwakira 2026NO
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Copper Foil: Sheet Rolled Thin with Anneals Between Passes

Copper foil is copper taken thinner than sheet. Copper hardens as it is worked and softens again when heated and quenched, so a sheet can be rolled down pass after pass, annealing whenever it stiffens, until it is thin enough to cut with scissors and wrap round a joint. The picture: a strip of copper foil.
Hagati
An afternoon

Amabwiriza

1

Anneal the sheet

Lay the copper sheet on fire bricks, heat it with the torch to a dull red seen in shade, and quench it in water.

Ibikoresho by'iyi ntambwe:

Urupapuro rw'UmuringaUrupapuro rw'Umuringa1 igice

Ibikoresho bikenewe:

Itafari ryihanganira umuriroItafari ryihanganira umuriro
Itara rya PropaneItara rya Propane
Amafashi y'umucuziAmafashi y'umucuzi
Indobo yo gukonjeshaIndobo yo gukonjesha
Amadarubindi y'umutekanoAmadarubindi y'umutekano
2

Roll it down

Pass it through the rolling mill, closing the rolls a little each pass and always feeding the same way.

Ibikoresho bikenewe:

Imashini isingiya icyumaImashini isingiya icyuma
3

Anneal when it stiffens

When it springs back and resists, anneal it again as in step 1, dry it, and carry on rolling.

Ibikoresho bikenewe:

Itara rya PropaneItara rya Propane
Amafashi y'umucuziAmafashi y'umucuzi
Indobo yo gukonjeshaIndobo yo gukonjesha
4

Measure and trim

Measure the thickness with a micrometer; stop when it is as thin as you need. Trim the split edges with snips and give it a last anneal if it must bend.

Ibikoresho bikenewe:

MikorometeroMikorometero
Ibyuma bikata ibyuma bisanzweIbyuma bikata ibyuma bisanzwe

Ibikoresho

1

Ibikoresho bikenewe

8

Iki gishushanyo gikora

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Agateganyo

Agapapuro k'umuringa

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Copper Sheet Forged from Cast Copper

Copper Sheet Forged from Cast Copper

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CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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