Blackening Fluid as the name suggests is used in the process for Blackening of Steel. A
protective coating, for the material during, storage and handling.
Articles to be blackened should be dry before immersion. Articles remain immersed for about 10 – 30 minutes
and removed, swilled and dried. Bath temperature should be maintained between 130 - 150° C.
Adding solution/ water should be done with the greatest care through a pipe, to avoid
spitting. The black color developed may be preserved with suitable oil.