[KwartzLab] Laser-cuttable masking materials (was: [LETPRESS] 3D Printed Parts)
kpmartin at thinkage.ca
Mon May 13 10:48:27 EDT 2013
I forget how this discussion got started on the Letterpress mailing list, something to do with 3D printing replacement Linotype parts, but it seems to have drifted off to laser-cutting masking films, and someone here has a suggested product to use...
the Papertrail Handmade Paper & Book Arts
New Dundee, Ontario
From: Letterpress Discussion List [mailto:LETPRESS at LISTSERV.UNB.CA] On Behalf Of Kalle Pihlajasaari
There is a product called LazerMask (http://www.rayzist.com/store/LazerMask_12_Inch_Wide_Roll_LM4R.php) and a few (just a few) other similar products that are suitable for CO2 laser engraving to create a sand blasting mask. (Vinyl masks are not suitable for CO2 lasers as the fumes are corrosive to the mechanics). There are a few masks that are made exclusively for spray paint back fill purposes using laser engraving but not up to the task of sandblasting.
Not sure if any of these or other films will work on your engraver but testing a sample might be worth a shot. They are used to protect the substrate and the image/text is cut out with raster laser engraving. The substrate is then sandblasted to get a deeper relief in metals, stones and glass usually but in your case you could engrave a bit more than just the mask film so no sandblasting required. The substrate can then be SPRAY painted to fill in the cut areas while using the same mask which is afterwrds removed when the paint is dry enough (not totally dry in some instructions).
If this or a similar film (die cut paper or frangible stickers) could leave a good enough edge engraved then you could paint through it. If you cannot get a film to do the job you may still be able to use a soft roller and put a layer of Vaseline (petroleum jelly) after engraving and then spray pain the grooves, wait till dry and wipe the Vaseline off.
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