[josey.mathew]

hi
The copper layer of a homemade pcb quickly oxidises after the print is removed. How can i prevent this ? I have heard that varnish is good but which one??

One more thing is when we buy a copper laminate the copper layer is nice and shiny and it doesnt oxidise. How can i obtain the same finish after etching ??

[Alpha-Omega]

Have you considered tin plating?

[ARGOS++]

Dear Josey.Mathew;

One of the cheapest varnishes for homemade PCB’s is “Cellulose Lacquer” known as “Zapon”.
Advantage: “Zapon” melts/destroys during later Soldering, and is normally very cheap.
I always diluted it with 4 till 10 parts of Acetone to get very thin layers.

I hope this may be of help to you.

Good Luck!
                    ARGOS⁺⁺

[josey.mathew]

Hi Alpha-Omega how can i tin plate at home as cheaply as possible ??

Hi ARGOS++  I am from India can u tell me where i can get Zapon ?

Thanks a lot for your replies

[Alpha-Omega]

Here are some links-explanations, kita, and manuals you can order:

http://www.technick.net/public/code/cp_dpage.php?aiocp_dp=guide_pcb

http://www.electronics.dit.ie/techprocs/p_c_b.htm

http://www.megauk.com/pcb_chemicals.php

http://www.caswellplating.com/kits/tin_plate.htm

http://caswellplating.com/kits/complete.htm

http://www.caswelleurope.co.uk/plugplat.htm

Hope this helps...

[ARGOS++]

Dear Josey.Mathew;

“Cellulose Lacquer” known as “Zapon” I buy normally in a Drugstore or Chemist’s shop (in German: Drogerie).
Sometimes also Art/Craft Shops/Suppliers sale this kind of stuff.
I don’t know what best compares in India to these shops.

“Zapon” is based on “Cellulose Nitrate” dissolved in Ethyl Acetate, Ethanol, Amyl Acetate, etc.
You may get additionally Information on:   "Nitrocellulose”
(It may be also of help for discussions with shop owners.)

I hope you can find a supplier of such stuff.

Good Luck!
                    ARGOS⁺⁺

[josey.mathew]

thanks for the replies
I will soon check out the sites and the stores