Home › Steel › To Restore Burnt Cast-Steel

To Restore Burnt Cast-Steel

to about the color of straw, plunge in cold Take 1½ pounds borax, 1/2 pound sal-ammoniac, + pound prussiate of potash, 1 ounce resin.

Pound the above fine, add a gill each of water and alcohol. Put in an iron kettle, and boil until it becomes a paste. Do not boil too long, or it will become hard on cooling.