Homebrew PCBs

> Secondly, anyone here happen to know the compoistion of Staedtler Red
> Lumocolor Permanent Pens? I understand that they are dry-proof, but I
> wonder what is based of.

The following may give some insights:

"Aqueous ink having an extended cap-off time and process of manufacture  
thereof
Patent number:	US5961703		Publication date:	1999-10-05	
Inventor:	FRAAS ROSMARIE (DE)	Applicant:	STAEDTLER FA J S (DE)

An aqueous ink having an extended cap-off time and a process for  
manufacturing the ink, wherein the aqueous ink is composed of water as the  
predominant or exclusive solvent, hydrocolloid/hydrocolloids or  
polysaccharide/polysaccharides as binding agents or film-forming agents,  
moist-keeping agents, coloring agents, emulsifying agents and possibly  
additional additives, wherein the ink further includes gum arabic and bees  
wax as film-forming agents. The ink is particularly an ink for writing,  
drawing, painting, printing or marking on normal paper or other absorbent  
writing carriers. The ink is particularly intended for use in fountain  
pens, ballpoint pens or stencil writers, in so-called felt-tip pens or  
pencils, in ink jet systems and/or in other capillary duct writing devices  
or systems."

You can search the number at:
http://164.195.100.11/netahtml/srchnum.htm

Hope this Helps
James