Bright dip

Definition: Bright dip is an immersion acid based application used to protect and clean copper and brass. The finish can remove scale, oxide and tarnished surfaces leaving a uniform natural color. The material will readily oxide and JMD recommends using a conversion coating to further protect the material from corroding.

Available Processes

  • Hand-Line

Note: Bright Dip is a RoHS compliant metal finish


Definition: Electropolish is a process that removes material from the surface of stainless steel which creates a smooth, bright, mirror-like finish. The finish resembles polished chrome plating. Electropolish can also be used for deburring, cleaning, and passivating.


  • ASTM-B912-02 (re-approved 2013)

Available Processes

  • Hand-Line

Note: Electropolish is a RoHS compliant metal finish


Definition: Caustic etching is an immersion process that is used for cleaning and removing oxides which provides a consistent, uniform matte finish. The finish is commonly used for deburring, and preparing parts for paint, powder, anodizing, chromating and other metal finishes.

Acid etching is a mild form of cleaning aluminum. The acid etching process JMD follows does not remove material which makes it a great candidate for machined parts with tight tolerance holes. This finish will not dull the material but will remove oxidation from the surface of aluminum.


Definition: Passivation is the removal of exogenous iron or iron compounds from the surface of stainless steel by means of a chemical dissolution. The passivation removes contamination left behind from machining and fabricating processes. Contaminants left on the part could result in corrosion and deterioration of the stainless steel.


  • Method
  • Nitric 1, 2, 3, 4, 5
  • Method
  • Citric 1, 2, 3, 4, 5



Mil-STD-171, 5.4.1


Available Processes:

  • Hand-line

Note: Passivate is a RoHS compliant finish.