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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.
中级
An afternoon
说明
1
1
Anneal the sheet
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.
此步骤所需材料：
铜板1 个所需工具：
耐火砖
丙烷喷灯
铁匠钳
淬火水桶
安全眼镜2
2
Roll it down
Roll it down
Pass it through the rolling mill, closing the rolls a little each pass and always feeding the same way.
所需工具：
轧机3
3
Anneal when it stiffens
Anneal when it stiffens
When it springs back and resists, anneal it again as in step 1, dry it, and carry on rolling.
所需工具：
丙烷喷灯铁匠钳淬火水桶4
4
Measure and trim
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.
所需工具：
千分尺
铁皮剪此蓝图制作
CC0 公共领域
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