[header] How to anneal copper [title] Connect the red welding torch hose to the acetylene tank, and the black hose to the oxygen tank. [substeps] The acetylene tank is used for starting the flame and the oxygen tank is used to continue feeding the flame and to control the intensity of the flame. [title] Put on your safety goggles. 
[substeps] Wearing safety goggles is a precaution necessary to ensure eye safety anytime you are working with open flames. [title] Switch on the acetylene by turning the valve halfway.