No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Photo resist for electroplating




I am looking for a photo resist that I can apply on copper clad (printed circuit board material). The idea is to electroplate a tin photo image onto the copper. I already have a successful tin plating setup at home using tin acid electrolyte. I tried using a water based silk screen photo emulsion as the photoresist. The problem being that the emulsion is not designed for total water resistance and will absorb a small amount of water. Its therefore not resistant to electroplating because tin ions can travel through the emulsion coating and deposit onto the copper. In the printed circuit board industry they use a special photo sensitive dry film, but I cannot buy this in less than 1000 ft.sq rolls. I am interested in knowing what industries may use a photo resist in a liquid form. I then may be able to start ringing around for a local supplier. Any help on this will be greatly appreciated as I've already spent weeks looking for a suitable photo resist. Adam

Adam Seychell
- Australia
1999



The problem you'll encounter with the solvent based resists will be that most companies won't want to sell them to an individual. I know here in the states it would be difficult since they are very volatile solvents. I wouldn't recommend using that type at all in a non-industrial setting due to the toxic fumes.

A good alternative is to buy the sheets precoated with the dry film. Several companies offer various materials this way. It would save you several steps in your process and not be much more than the cost of the material. One company that comes to mind is Kepro. They have a web site you can check to see if they would be able to get the material you need. If you really want to laminate your own material they do sell a small laminator and rolls of material in 125' lengths.

jim conner
Jim Conner
Anoplex Software
supporting advertiser
Mabank, Texas USA
Anoplex logo
1999


In Germany or Switzerland you can find photo resists in catalogs for hobby electronic freaks. One product name is Positiv 20, and we used it for partial plating in nickel-baths. Maybe you can find something similar in Australia too.

Marcus Hahn
- Sachseln,Switzerland
2000




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"