Tempered means 1) heating and then cooling a metal in order to make it hard; 2) the exothermic reaction involving a volatile reaction mass where the heat losses due to the latent heat of vaporization balances the heat of reaction.
Tempered means 1) heating and then cooling a metal in order to make it hard; 2) the exothermic reaction involving a volatile reaction mass where the heat losses due to the latent heat of vaporization balances the heat of reaction.