We have evaluated this finish and found it works well with good bonding, and no 
pink ring in evidence after processing. The finish is a reddish brown which 
appears dark brown after bonding and is similar to black oxide once solder mask 
is applied. The chief benefit is that it can be used in horizontal conveyorised 
equipment. Vertical application is not recommended although possible. The cost 
is claimed to be lower than reduced black oxide and the process more easily 
controlled.

In your message dated Thursday 19, December 1996 you wrote :
> 
> Our company is thinking about testing the Alpha preq process from alpha
> metal to replace our black oxide process. Unfortunately, not many people
> have experience about this process in this part of world. We will appreciate
> if anyone got some comments for that. Thanks in advance!
> 
-- 
Paul Gould
EMail [log in to unmask]

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