jgh4445
Member
Also not a good idea to run your finger along the leading edge of the flint to see if the knapping job was a good one..
The sparks are the steel burning after its been chipped away from the rock or is it the other way around?Actually the color and shape of the sparks is determined by the chemical makeup of the steel as well as the hardness. Google "Spark test" and you should be able to find a chart giving those indications. We had that as a test when I was in Tool and Die school.