AW: [sdiy] rack enclosures

[Ullrich Peter]

Hi Hallvard!

>1) According to this illustration:
>http://de.wikipedia.org/wiki/Bild:Indirektschablone.jpg
>.... I can use a special plastic film that I use UV-light with and a 
>chemical process. I believe it's very similar to photosensitive PCBs, 
>though the illustration fails to show the overlay of the actual stuff 
>you want printed.
>But for the paint to get through the plastic foil (stencil) the 
>lettering, patterns or whatever you want transferred has to be holes in 
>that stencil, right? So how to you create for example an "O"?
>I'm thinking of the same principle as those "military stencils" where 
>letters and numbers couldn't have any opening, and an "O" for example 
>wouldn't be painted as a coloured ring, but as a coloured filled circle.
>Am I missing something here?

The red part of the complete foil is a gelatine. Only this part will
stick on the stencil as the polyester foil will be removed after the ficture!
So also an "O" is possible.

Maybe you should copy the german text out of this page and put it into 
google translation or similar:
http://www.google.com/language_tools?hl=en   -> German to English

Then you get this text - I hope this helps:

Indirect template (indirect films) These films consist of a polyester foil
(transparency), which are coated with an photo-sensitive gel layer. They will
transfer after exposing, a chemical secondary hardening with hydrogen peroxide
and the washing (develop) of the print format to the lower surface of the
filter. After drying the film the polyester foil is removed. The indirect
template clings only on the lower surface of the fabric, it can comparatively
small in the fabric embody itself, therefore one here often speaks to fabric
template of one „“. Templates, which are laid on above as described with liquid
Kopierschicht reciprocally on the fabric, cling substantially better in the
fabric („in fabric template “). Despite the small anchorage in the fabric and
the limited edition stability resulting thereby, indirect templates are used for
special work (particularly with the pressure of fine rasters), since the quality
of the printed result is very high. Also indirect films are offered, which do
not have to be chemically after-hardened after the exposure any longer. Indirect
templates are very thin and are suitable only for fabric refinement starting
from approx. 77-90 Fäden/cm and more highly. Indirect templates are not suitable
for the pressure with water-dilutable silk-screen inks.
Ciao
Peter

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Peter Ullrich I Hardware Engineer, Research & Development
Phone +43 (0)50 811 2265 I Mobile +43 (0)664 628 2265
eFax +43 (0)50 811 992265 I peter.ullrich at kapsch.net

Kapsch TrafficCom AG I Wagenseilgasse 1 I A-1120 Vienna I Austria
http://www.kapschtraffic.com/ I http://www.kapsch.net/
Registered at Commercial Court in Vienna FN223805a
Registered Office Vienna

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