The TRU TEMP® metal finishing process is a new low-temperature black-oxide process that operates at only 200°F and is designed to offer safe operation and short process time--without EPA regulated metal content. The process is said to blacken all iron and non-stainless steels, even MIM parts, without white salt leaching or off-color finishes. The finish is a durable, satin magnetite of 0.000020 inch (0.5micron) thickness with excellent corrosion resistance. Overall process time is said to be only about 20 minutes. The finish is said to satisfy Mil Spec DTL 13924D and AMS 2485. Because there is no EPA regulated metal content, the process rinse waters are generally sewerable without waste treatment.