Screenprinting......

[Dave Halliday]

>     I have *read* that if you use copper screen material, it lasts longer 
>     and hardly stretches, but it's more expensive.  But I've never 
>     actually done any screenprinting, so don't just take my word for it.
>> From:          "David Halliday (Volt Computer)" <a-davidh at microsoft.com>
>> To:            synth-diy at horus.sara.nl
>> Subject:       RE: Preliminary report on screenprinting......
>> Date:          Wed, 23 Jul 1997 14:38:09 -0700

>> If you use a large screen, you can put several images on the screen and
>> use masking tape and butcher paper to mask out the ones you don't want
>> to use.  You could probably do six or eight module faces per screen.
>> 
>> The downside to using a large screen is that they do stretch a bit - go
>> easy with the squeegee ( I would love to know where that word came
>> from... )
>> 



Copper would corrode and also, copper work-hardens pretty bad.

Work hardening is what happens when you take a paper clip and bend it 
back and forth a few times and snap...

Stainless Steel is used for this - it is less stretchy than the 
polyester screens but it has less open area.  It takes a lot more 
pressure to print, you can't get really good black areas but it is 
dimentionally stable.

It is also about 20 times the cost.



Using a larger screen is actually not that bad - I have done this for
front panels, plastic advertising printing and PC boards.

I used to have a copy and print business for 12 years





TTYL - Dave



--- Via Silver Xpress V4.4 [Reg]