There are standards covering artwork generation, screen meshes and inks etc.

BS ISO 12637-5:2001
Graphic technology. Multilingual terminology of printing arts. Screen printing 
terms
Current
£32.00
£64.00


BS ISO 12647-5:2001
Graphic technology. Process control for the manufacture of half-tone colour 
separations, proof and production prints. Screen printing
Current
£32.00
£64.00


BS ISO 2846-4:2000
Graphic technology. Colour and transparency of ink sets for 
four-colour-printing. Screen printing
Current
£32.00
£64.00


However the final result will have much to do with your original design and 
artwork quality in the first place though.

It will also depend on your own acceptability criteria which only you can 
define.

If you have a viable artwork design the screened item should be as perfect as 
the artwork if screened on an ideal medium, but there are many variables:

If you:
have tiny print (text<1.5mm) then you might expect it to get blobby.

are printing on a textured paint finish then you may get bleed and don’t expect 
to reproduce fine detail well.

are printing closer to an edge it may be difficult to execute

have small features they may not reproduce well

you have large screens which need to align with many holes you might need to 
re-think and maybe break it into several pulls especially if the screen is 
concentric to a hole.

I think there are too many factors there to be able to produce a generic 
standard – don’t you?


Regards,
Chris
________________________________________
From: [email protected] 
[mailto:[email protected]] On Behalf Of Denomme, Paul S.
Sent: 05 April 2005 20:44
To: Emc-Pstc Discussion Group
Subject: Industry Silk Screen specification

This may be bit a bit off topic for this group, but does anyone know of an 
industry specification that dictates silk screen quality acceptability 
standards as it may relate to sheet metal printing as well as printed circuit 
board printing ?  I have done a lot of searching on the internet and I could 
not find anything.  I went to global Engineering and performed a search and 
although it listed several specifications, none of the specifications were what 
I was looking for.

Any information would be greatly appreciated.

Paul Denomme
Viasystems
Richmond, VA

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