The lower the acid ph, the higher temperature required--rule of thumb.
Best,
Jerry Daniels
Tool makers for the 21st century
http://www.daniels-mara.com/products
On Dec 16, 2005, at 10:34 AM, J. Landman Gay wrote:
> When applying a patina to cold rolled steel using a patina that does
> not contain acid is t best to warm the metal first? If so, is
putting
> it out in the Sun acceptable?
>
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