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topic 1953

How to get paint off the rest of the surface after "etch and fill"


(1998)

Hi metal finishers,

Let me "paint" this picture. We etch most metals to create architectural nameplates or equipment ID plates. We are using dry film for deeper etching and we have to introduce color(s) in the etched areas. We currently strip the plate and then spray the color(s)for the in-fill and then tediously sand the plate's face to remove paint from the surface. There has to be an easier way! Is there a stripper that will undermine the paint covered resist and not affect the paint if-fill? Should we try to strip the resist before the paint fully cures? Should we use a special paint that will stick to the metal but not to the resist? I've seen other etched products with beautiful fills but we haven't found the right procedure. Sometimes I feel we're "painting ourselves into a corner"! Any thoughts? Thank you in advance.

Mike Dywan
- Phoenix, Arizona


Septemer --

Just an idea:

Depending on what you have for a resist and what you have for paint, there may be a temperature rating difference. In case of thermal photolaminates, the resist becomes quite soft, even liquid, around 150-200 deg. It may be possible to let the paint dry, heat the work, and skim off the unwanted paint along with the resist. The remaining resist residue should be exposed well enough to remove with its normal stripper, as long as it's compatible with the paint.

Danny Miller

(2006)

Please help point me in the correct direction as to where I can learn how to "etch and fill" (on the high end) or simply produce metal nameplates. I would like to learn this for my business.
Thank you for your help.

Mark Adler
Screen Printer - industrial label printer - Saint Louis, Missouri


May 12, 2010

Hi, Mike. As long as you've put resist on the surface for your etching anyway, why not electrophretically lacquer the etched lettering? This electropaint won't stick to the resist, so you can easily strip it since it won't be covered with paint.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E. RET
finishing.com
Pine Beach, New Jersey



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