Homebrew PCBs

Hello, 
i have made a tests with Bungard solder Mask and direct white
printing over it with UV hardered INK before solder mask hardering.
It works. I have tried it with a 7feet industrial printer. Now
i must check, if modifying a epson printer and using this ink, i can
reproduce the same result. On the industrial machine, i had the 
feeling, that the UV curing is a combination of UV and heat curing
(70-80 degree). Because i have only access to high resolution piezo
printing, i probalby must filter the ink prior using it in order to
not obstruse the head. Do your have a idea, how i can build a 5um
filter ? The industrial machine had a 300 dbi piezo print head.
Further updates are coming as i have resolved this problem.
As note, i have access to the ink as 1 Liter refill tetrapack.

Chris

At 09:53 PM 5/26/2008 -0000, scx31114 wrote:
>Because i have only access to high resolution piezo
>printing, i probalby must filter the ink prior using it in order to
>not obstruse the head. Do your have a idea, how i can build a 5um
>filter ?


The McMaster-Carr company (www.mcmaster.com) carries very fine
mesh materials.   Their part number 92715T32, for instance, is a stainless
steel screen with a 5 micron rating, but with a price of $183 for 12" x 12"!
They also carry plastic mesh and metal sieves, but I don't know if they're
fine enough for your needs.

McMaster carries -all sorts- of materials for building things, and it is easy
to spend a lot of time on their website.   Be carefull, I often end up buying
something from them I never knew I needed.

Mike

--- In Homebrew_PCBs@yahoogroups.com, Mike Schoenborn <rtfm@...> wrote:
>
> At 09:53 PM 5/26/2008 -0000, scx31114 wrote:
> >Because i have only access to high resolution piezo
> >printing, i probalby must filter the ink prior using it in order to
> >not obstruse the head. Do your have a idea, how i can build a 5um
> >filter ?
> 
> 
> The McMaster-Carr company (www.mcmaster.com) carries very fine
> mesh materials.   Their part number 92715T32, for instance, is a
stainless
> steel screen with a 5 micron rating, but with a price of $183 for
12" x 12"!
> They also carry plastic mesh and metal sieves, but I don't know if
they're
> fine enough for your needs.
> 
> McMaster carries -all sorts- of materials for building things, and
it is easy
> to spend a lot of time on their website.   Be carefull, I often end
up buying
> something from them I never knew I needed.
> 
> Mike
>

A similarly useful but dangerous vendor is Small Parts, Inc. <
http://www.smallparts.com/ >.  I seem to recall from (my lab rat days)
that they sell stuff like Millipore filters and other good things in
small quantities (not cheap, though) of stuff experimentalists use.

-- Dave