Blacksmith
The next step is to "draw the temper" or "temper" the steel, so that it will not break like glass. To temper steel, a blacksmith polishes a part of the steel so that it is smooth and shiny. The blacksmith then slowly heats the steel in the fire. When the steel is between , the polished steel will turn different colors. These colors do not glow in the dark; they look like dye on the polished steel. As the steel gets hotter from 300 to 650 degrees F, it will turn through the colors: yellow, then brown, then purple, then blue. Yellow means the steel will still be harder, blue means the steel will be softer (but still hard). When the steel turns the color that the blacksmith wants, he puts the steel into a bucket of water to stop the change. Different tools are tempered to different colors, but it also depends on how much carbon there is in the steel. Usually, stone chisels are tempered to yellow, and axes for trees are tempered to blue, but the blacksmith has to decide.