Homebrew PCBs

Patrick and Markus, THANK YOU !
I am following this group for more than one year but your revealings
shared here it is the first professional  information that I have
found it here. Are indeed some ingenious hacks in this group too but
you two deserve a prize.  I would like you to have some beers on my
account or a bottle of wine.

Continuing on trough hole plating :
1. Patrick - your solution it is very ingenious to have more simple 
holes plated and ready etched. I have understood that in this process
you use the film positive (tracks and pads are black) and the
photoresist negative. This spray :
http://www.crceurope.com/csp/web/ProdDisp.csp?lng=3&country=ALL&product=TRANSPARANT%2021&business=ELECTRONIC
Makes a regular printer paper transparent to UV light. Could you
please tell us what could be used to replace it ? (of course a cheaper
version). This way a regular laser print could be used as a film !

Patrick could you also give us some recipes some of baths ? Did you
prepared at your work or you have bought them from a specialized company ?

2. Suske - could you share with us from where do you plan to buy the
chemicals for baths ?

Kind Regards,
Daniel