home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!uknet!acorn!agodwin
- From: agodwin@acorn.co.uk (Adrian Godwin)
- Newsgroups: sci.electronics
- Subject: Re: Success! Resist Pen Works in HP Plotter!
- Keywords: resist pens, pcb, etching
- Message-ID: <18311@acorn.co.uk>
- Date: 4 Sep 92 08:46:02 GMT
- References: <78655@ut-emx.uucp>
- Organization: Acorn Computers Ltd, Cambridge, UK
- Lines: 41
-
- 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.
-