There is a small fee for samples shipped in the continental U.S. This can range from $10-$75. Products shipped outside the continental U.S. can be subject to certain restrictions. Freight charges may range from $75-$300.


The premium grade Black Oxide that actually costs less to apply, EPi's Ultra Blak products penetrate the surface, become an integral part of the surface, and provides for protection of the surfaces. Blackened parts retain their surface properties and dimensions. The Ultra Blak process produces a pleasing, decorative black finish.

The modern low cost successor and great alternative to hot black oxidizing, Insta Blak products are mild chemical solutions used at room temperature to blacken all types of steel surfaces.

To send sample parts for plating, please print, complete and return this PARTS FORM.

Hot Black Oxide Advantages:

  •     No dimensional change (paint builds up)
  •     Reduces handing of parts- many parts can be done in a rotating barrel
  •     No primer or precoat phosphate required
  •     No bake oven – no volatile organic fumes
  •     Less equipment and less maintenance of equipment
  •     Higher productivity – less setup and less processing time
  •     Meets Military Spec MIL-DTL 13924D and AMS 2485 H


Mid Temperature Black Oxide Advantages:

  • 30-45 minute blackening time
  • Abrasion resistant: no chipping, peeling, or rub off
  • Beautiful, glossy blue/black color
  • No Boiling- safer process for machine operator
  • Considerable energy cost savings
  • Passes oxalic acid military test
  • Meets Military Spec MIL-DTS 13924D and AMS 2485 H


Room Temperature Black Oxide Advantages:

  • High Productivity - Parts can be blackened in two minutes vs. 15 to 30 minutes for hot black oxide. Twice the amount of parts can be blackened in the same amount of time.
  • Versatility - Blackens many different types of metals including cast iron, forged steels, mild steels, hardened steels and powdered metals.
  • Convenient - Easy to do in-house. No need to heat blackening solution. Ideal for high volume or short run projects.
  • Energy Cost Savings - Blackening is done at room temperature vs. hot oxide blackening done at 290º.
  • Safety - Blackening solution uses odorless, mild, water-dilutable chemicals. No venting needed or hazardous caustic chemicals.
  • Low Maintenance – Longer Equipment Life - No expensive pollution control equipment. Only a simple ion exchange system is required in those rare installations when discharge of metals exceeds regulations.
  • Environmentally Friendly – Zero Discharge