[labnetwork] Transparency masks

[John Lee]

Hi, Demis.

Over the years we used 3M's products like CG3700 and PP2500 for the
very coarse "souvenir" patterns, but oddly those specific products
seem to be out of production.

One strategy that has interestingly worked is to print first using a
nice laser printer on ordinary white paper, and then run it through a
high-end office printer onto transparency film. Depending on what
copier you're using, the result on a good copier sometimes can be not
only more robust but also more opaque than on a laser printer (going
directly onto plastic).

More frequently when needing a low-cost alternative to glass-chromium
(when resolution can be coarse, that is), we go with laser
photoplotting services such as https://artnetpro.com/,
https://advancerepro.com/, or others. Minimum feature size is
generally good to ~10 µm. Feel free to reach out offline if you'd like
more detail.

Best,
-John
________________________________________
Sang-Joon (John) Lee, Professor
Mechanical Engineering, San José State University
One Washington Square, San José, CA 95192-0087
408-924-7167 | sang-joon.lee at sjsu.edu


---------- Forwarded message ---------
From: Demis D. John <demis at ucsb.edu>
Date: Mon, Jan 29, 2024 at 4:58 PM
Subject: [labnetwork] Transparency masks
To: labnetwork <labnetwork at mtl.mit.edu>

For one of our outreach events we print user’s images onto
transparencies, for litho on an MA6.

However we often run into the problem that for some combination of
transparencies and printer ink, the ink just rubs right off the
plastic transparency, even if left to dry for hours!

We believe that the same transparencies that worked last year, this
year had the ink rub off. Do we need to vac seal the transparencies
when unused?

If anybody knows what the combo is that works/fails, your advice would
be greatly appreciated.

-- Demis

----------------------------------------
     Process Group Manager
 UCSB Nanofabrication Facility
         Demis' Contact Info
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