Why the aluminum foil should have anneal craft
Anneal is to make the aluminum soft then its ductility becomes better.if not having anneal, the problem may appear unexpectedly like aluminum foil broken in the rolling process.therefore, the anneal must be conducted each time after rolling. this can help the aluminum rolling process goes plainly.
The metal hardness processing is making the hardness higher and the ductility worse. it needs to revert to the anneal to press the aluminum.The process needs to have anneal several times.
