🚀 go-pugleaf

In article <78655@ut-emx.uucp> david@moe.ece.utexas.edu (david lee) writes:
>
>And in the catagory of 'Best Pen to Withstand Etching of Copper Clad
>Circuit Board Using Ferric Chloride' the winner is....
>
>Manufacturer: Staedtler
>Model: Lumocolor 313 AV
>Ink color: Red
>
>This Pen is available in several sizes; The S size has a 0.4mm tip
>which is PERFECT for running traces *between* the 0.1 inch spacing
>of DIPs. After Etching the boards in warm ferric chloride, every other ink

.. and also in several shapes, including some that are made to fit HP
plotters ! After noticing that the plotter pens I was disembowelling to
fit Lumocolor tips into were also made by Staedtler, I went hunting for
an OHP plotter pen from the same company.

They make :

	31HP07K-2	0.7mm, short pen for 7220 and similar
	31HP03K-2	0.3mm, ditto
	31HP03L-2	0.3mm, long pen for Draftmaster etc.

(-2 indicates red ink)

I tried the 31HP03K-2 last night and it appears to be exactly the same ink
as the 313 AV. It certainly works as well !
The tip on this pen is similar to that on the 'Fine' (318 AV ?) Lumocolor,
and suffers slightly from poor ink transfer - fine lines appear in the resist,
and it leaks slightly. I had this problem with all the Lumocolor pens I tried,
to a greater or lesser degree. It certainly appears to be worthwhile plotting 
the tracks twice (or perhaps using a very slow plotting speed) as another
writer suggested.

-adrian


-- 
Adrian Godwin : agodwin@acorn.co.uk : adrian@fangorn.demon.co.uk : g7hwn@gb7khw
ObDisclaimer  : I believe this rubbish .. don't imagine that anyone else does.