Letter 19052

Colour Determining Parameter in a PVD Process [India] 

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Dear Sir,

This is regarding IonPlating of Gold (Brass PVD). Does the Colour of Gold (after deposition) on a part depend on the previous process (say, TiN coating) or it depends only on the Composition of the Gold Target? What is the Composition of Gold to achieve a 3N Colour, with good adhesion thro (Brass) PVD Process? Assumptions : Max.Practical Carat Value for Gold (Say, 22 to 23.x)

Best Regards,

V.Karthik
- Hosur, Tamil Nadu, India

To achive 23K you need to use 24K gold lump. All it will depend what process you are using! TiN will take your colour towards black, Brass will give you great problem due to Zinc in it. System with sputtring is different and it will give 22 to 23 K colour with arc source is different it will give you better adhesion and better 23K colour.

Zubair Aamir
SinoPak - Lahore, Punjab, Pakistan

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