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Steel blueing for watch hands




Dear Expert,

We are manufacturing steel blued watch hands.The material used is highly polished steel and blueing is done by thermal process.(i.e by heating in a electrically oven) The problem we are facing is , when we subject the parts to tropical climet test (as per DIN 50015) some components fail in the test.(not all the component subjected to test will fail) We would like to know is there any process to protect the Blued surface.We cannot use spray of clear lacquer as it is acceptable.

Jayasimha G
Product Designer - Bangalore, Karnataka, India
July 1, 2008



Try 5-20 % shellac solution+you must bake them 30 minutes at 120-180 C.Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
July 4, 2008


Oops I missed this point, lacquring on the blued surface is NOT ACCEPTABLE.

Jayasimha.G
- Bangalore, Karnataka, India
July 8, 2008



Dear Experts,
Can any body suggest a solution to my problem?

G.Jayasimha
- Bangalore, Karnataka, India
July 28, 2008



August 22, 2008

Jayasimha,

Did you ever have any luck with this? I have a similar application that I am working on and would be interested in knowing the results/method?

Thank you.

Drew Shepard
- San Diego, California




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