Place about two thirds of 1½–2 lb. chocolate, finely chopped, in a double boiler or metal bowl over simmering water. Stir frequently and monitor the temperature (120° for dark chocolate, 105° for milk/white chocolate).
STEP 2
Remove from heat once fully melted. Wipe the bowl to remove condensation.
STEP 3
Gradually stir in remaining chopped chocolate, letting each addition melt completely. Cool to about 82°.
STEP 4
Return chocolate to heat, reheating to 88°–91° for dark; 85°–87° for milk/white.
STEP 5
Spread chocolate on wax paper. If it dries glossy, it's tempered.