15th July 2020


Manufacturers needing immediate corrosion protection on small quantities of parts can get it with the quality of larger finishing systems using Birchwood Technologies’ Mini Presto Black line.

The BK-1 line is a low-cost alternative and/or substitute for large scale finishing. This room temperature blackening system for iron and steel handles small production operations that require robust corrosion resistance and galling protection on critical surfaces for machine components.

The process produces a coating of less than 0.5 microns thickness and is suited for components that require a black finish for visual appeal and rust protection. It offers is a short, 15-minute process that eliminates the hazards of the hot oxide process by operating at room temperature of 70 deg F. It provides high corrosion resistance and is tested for up to 800 hours humidity exposure when sealed with an appropriate rust preventive.

It can be used on hot rolled steels, alloy steels, tool steels, as well as cast iron, forged steels and powdered metal. It protects the underlying metal itself from galling and deformation.

The Presto Black BK-1 system contains seven tanks and covers, hot-plate (for heated cleaner), plus all the chemicals needed to operate a five-gallon blackening line. This includes one gallon of Presto Black MKP, 1 gallon of Presto Black RPL, 5 gallons of Dri-Touch Plus IRP3 water displacing sealant and complete instructions.