Bichromate Alternative

[motif]

Unfortunately Diazo is not available in my country

I am planning to use Cyanotype, as the chemicals are easily available, comparatively safe and economical.

I will update my findings after some time.

Thanks everyone for your views and suggestions. Really appreciated.

Regards,
Motif

[motif]

I tried cyanotype on paper and it worked perfectly fine. Now I wanted to try it on PCB but the solution is so thin that it doesn't stick to copper surface.

I am using 8% solution of potassium ferricyanide and 20% solution of ferric ammonium citrate (mixed in equal volume)

Any idea how can I make it work?

Regards,
Motif