Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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"Yellow Bleach Lacquer ZN" -- is it Trivalent or Hexavalent.
August 4, 2009
What does it means " Yellow Bleach Lacquer ZN " ?
Is it trivalent or hexavalent.
Regards,
buyer - Pune, India
Hi, Sunil. It means very little, an in-house shorthand perhaps meaning zinc plating followed by yellow chromating followed by leaching the color out, followed by a dip in water soluble lacquer... perhaps. It says nothing about trivalent vs. hexavalent.
It sounds like you may be reading a catalog for some kind of standard part and then trying to represent to others the specifications of the finishing. This is very dangerous. If the end user needs a specific finish, you unfortunately have no choice but to go back to the source and get a certification to that effect. Good luck.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
August 4, 2009
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