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topic 3894

Photographic Etching of Steel Molds


(1999)

We are looking for a better, more uniform way to etch a steel mold. We create a negative image on the mold and etch it to protect it from corrosion. Then the unetched portion of the mold is removed. Most of the problem comes from welded areas and rings that have a different metal composition from the rest of the steel mold. The steel mold may be H13 etc. The problem is that the weld areas show up on the negative and it does not look good on the finished product. The finished product may be a leather grain effect on a form of plastic. We have heard that using Silver Nitrate may help solve the problem. If this is correct, we need to know how much Silver Nitrate and what other chemicals is it combined with? Your help or referral will be greatly appreciated.

Scott Brogdon
- Cincinnati, Ohio


(2002)

Dear sir,

Required your honest help for texturising/ etching technology for plastic mold surface. I am a mechanical engg. deadly in search of above. Your immediate reply in this regard is highly appreciable.

Thanking you, with regards,

GAJANAN TUPTEWAR
- Pune, Maharashtra, India



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