Manufacturers evaluating taking Black Oxide finishing in-house now have a low cost and safe entry option with the Birchwood Technologies BT40 Presto Black finishing system. The seven-tank process line, with 20 minute room temperature blackening capabilities, comes complete with tank system, heaters, plumbing connections, 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 new BT40 Presto Black system is pre-engineered to set up quickly and operate safely. It utilizes seven individual tanks, each measuring 16 x 24 x 24 inches deep (ID), and occupies a footprint of just 3 x 15 feet. The tanks are rugged and virtually unbreakable, manufactured of heavy weight, high-density polypropylene and polyethylene.
Setting up a room temperature in-house blackening line is now more economical than ever. 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 BT40 Presto Black line usually pays for itself in less than one year.
The non-dimensional Presto Black finish is a low cost way to achieve good corrosion protection and enhance sales appeal. With a uniform 0.000030 inch (1 micron) thickness, the porous crystalline structure of the black finish makes it an excellent absorbent base for a rust preventive top coat. Once sealed, the Presto Black finish resists up to 1,200 hours humidity test without chipping or peeling.
