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topic 54130

Formulation of stencil etching chemical for surgical instruments




January 15, 2010

Q. Dear sir,
As we are making etching stencil which is working successfully in Sialkot Pakistan.As well as we are making etching chemical in which we are facing this problem that when we apply stamp it looks sharp and jet black and clean it with cleaner but after half an hour it becomes brown and get bold. Now we want the best solution from your side. If you have any better formulation regarding this please share with us.
Waiting for your reply.
Thanks

Sh. M. Imtiaz Imtiaz
product designer - Sialkot, Pakistan

January 18, 2010

Hi, M. Please tell us what etching formulation you are using, so a reader can hopefully advise you how to tweak it for a more stable black color. Also, the cleaner may be damaging the blackness, so please tell us what cleaner you are using. Although I know little about etching myself, improvements hopefully can be suggested by a reader. Thanks!

Regards,

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


January 22, 2010

Q. Dear sir

We are making a type of chemical in which we are using such type of things.

30 %  : H2NO4

1 LTR :water

10 % :glycerine

5 %   :Sodium bichromate

We know our methodology is wrong and it is just a tip which is working but not properly..

PROCESS : We are already told you that we are doing etching on surgical instruments. Definitely you've seen stamps on surgical instruments e.g. Scissors, tweezers, etc. We etch in 1 or 2 sec of 24 volt. The most famous chemical is SHELLING. It's called ELECTRO ETCHING in simple language.

CLEANER:

We make cleaner by mixing:

Soap

Shampoo

Kindly help us in finding /making better formulation.

Thanks

Sh. M. Imtiaz Imtiaz
product designer - Sialkot, Pakistan




May 27, 2011

Dear Sir,
I have already sent you mail of detailed chemical formulation of etching so that you may help us with a better formula but still are awaiting response. We are searching for better formula of it since 5 years. Kindly reply to us as soon as possible.
Waiting for your reply anxiously.
Thank you

Sh. M. Imtiaz Imtiaz
product designer - Sialkot, Pakistan


May 27, 2011

I hope that you meant 30% H2SO4 and not H2NO4 (which I have never heard of) or you are making a low grade nitroglycerine.

James Watts
- Navarre, Florida


June 2, 2011

Try searching at Monode.com

Justin F. [last name deleted for privacy by Editor]
- Smithfield, Utah, USA

September 16, 2012

I work with H2NO4 every day and believe the poster is wrong about what she is using. H2NO4 is nitric acid; the form she has given, when subjected to 24 volt at almost any amperage would explode violently.

kit haynes
- coos bay, oregon



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