Eden Prairie, Minnesota – Manufacturers evaluating taking black oxide finishing in-house now have an option with the Birchwood Technologies BC40 Presto Black finishing system. The seven-tank process line, with 20-minute room temperature blackening capabilities, comes complete with tank system, heaters, plumbing connections, and tank lids. Adding a Birchwood Technologies preconfigured ion exchange system to purify and recycle rinse waters makes a closed-loop, zero-discharge operation and eliminates environmental concerns.
The system’s seven individual tanks, each measuring 16" x 24" x 24", and occupies a footprint of just 3ft x 15ft. The tanks are manufactured of heavy weight, high-density polypropylene and polyethylene.
Easy to learn and safe to operate, these lines produce high quality satin black finishes and can often be operated by workers in adjoining machining cells, without adding new employees. An in-house BC40 Presto Black line usually pays for itself in less than one year.
The non-dimensional Presto Black finish is a way to achieve good corrosion protection and enhance sales appeal. With a uniform 0.000030" (1 micron) thickness, the porous crystalline structure of the black finish makes it an absorbent base for a rust preventive top coat. Once sealed, the Presto Black finish resists up to 1,200 hours humidity without chipping or peeling.