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Tinting tin plated parts blue

I have small tubular brass parts. They have been heat treated and electro tin plated.
They most be tinted a light BLUE for field identification. I can use some ideas on how to make them blue. Must nut rub off on hands and hold up to water. Would appreciate some help.

Bob Getz
Technical Manager - Norristown, Pa, USA
January 4, 2010

Try blue dyed nitrocellulose based lacquer.If it is ok for your application after that step you can bake it at 120 °C temperature(30 minutes).Hope it helps and good luck!

Goran Budija
- Zagreb,Croatia
January 8, 2010

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