Homebrew PCBs

I'm a QSL card printer....you might try one of these or equivalent.
This co wants you to "register", but you might find one of
these locally at a well-stocked pressroom supply company.
They cost around $11.  They come in various sized points.
http://lehmaninc.com/default.aspx?page=category%20search%20results&Curren
tPage=1&OrderByColumn=DESCRIPTION12&OrderByDirection=asc&CatList=1620&Par
ent=1588&tree=1552*06)+ANCHOR*0@@1575*%27BY+THE+NUMBERS%27*0@@1584*2438+G
UN+ARABIC*0@@1588*134+ADDITION*1620@@

Best,
Charlie, N0TT



On Tue, 22 Nov 2016 11:24:49 -0500 "Rob roomberg@... [Homebrew_PCBs]"
<Homebrew_PCBs@yahoogroups.com> writes:
  
I'm not looking to plot a massive circuit.
I just wanted to find the right ink for a .5mm technical pen
or
fine point marker
that would draw a trace on copper and resist acid etching.
FOR
touching up any missing or damaged TONER TRANSFERed traces.

I found that standard sharpies dry out and stop depositing ink.
I found that STAEDTLER LUMOCOLOR permanent 313 BLACK and GREEN ink
worked great...flowed freely..resisted etching......
so
I thought it would be interesting to see if there was an indutry standard
.5mm drafting pen ink that performed the same acid resist.




On 11/22/2016 04:44 AM, 'Dave Wade' dave.g4ugm@... [Homebrew_PCBs]
wrote:

  

> recommended using a red plotter ink made by Stadler (sp?) which
provided

> very good etchant resistance.

I have an HP7475 plotter. I have once used a much modified RED Lumicolor
pen to make one test board, and found the etch time fairly critical, but
I would say it was usable with some tunning.
I would say it would probably work with refinement but a fine pen takes a
long time to fill the lands on the plotter.
This must be around 2 or three years ago.