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Originally posted by bsbray11
We can be very cruel and obedient beings. It's in our nature, and unfortunately isn't unusual at all.
Originally posted by AgentSmith
Actually you'd better check back, unfortunately you got confused between the colour chart which is what needed to be regarded in 'diffused sunlight' and the steel itself which needed to be regarded in a 'dark or dimly lit room'.
Oh I made sure I was right before I posted that.... Don't worry about that.
Steel exhibits different colors depending on temperature. Temperatures above 800°F (427°C) produce incandescent colors; the atoms in the steel are so energized by heat that they give off photons. Temperatures below 800°F (427°C) produce oxidation colors. As the steel is heated, an oxide layer forms on the surface; its thickness (and thus the interference color as light is reflected) is a function of temperature. These colors may be used in tempering tool steel.