|
The aluminum was annealed by applying a coat of carbon soot from an acetylene torch (acetylene only, no oxygen), then heated with a neutral flame (acetylene and oxygen) until the black soot was burned off. This process takes the temper out of the aluminum, softening it to be more easily shaped. Don't quench it, but let it air-dry and it will retain the desired shape without springing back. View Related Article
|
|