Digital BW, The Print

As someone who has recently converted a 4800 from K3 to NK7 inks and 
does not have any plans to revert back in the forseeable future I am 
seeking advice re: using OHP to make transparencies. Previously I used 
my good old 2000P and OHP to make these but I'm now planning to do 
larger transparencies with the 4800. 

Any advice I can get (dry times, platen settings, manual feed, after 
coatings etc.) before my first go would be appreciated.

Thanks.

rternbach

Check out the Precision Digital Negative (PDN) Yahoo forum run by Mark
Nelson. Search for messages that contain "4800" and you will find that
some are finding it difficult to achieve desired densities on
Pictorico film.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "rternbach"
<RT@...> wrote:
>
> As someone who has recently converted a 4800 from K3 to NK7 inks and 
> does not have any plans to revert back in the forseeable future I am 
> seeking advice re: using OHP to make transparencies. Previously I used 
> my good old 2000P and OHP to make these but I'm now planning to do 
> larger transparencies with the 4800. 
> 
> Any advice I can get (dry times, platen settings, manual feed, after 
> coatings etc.) before my first go would be appreciated.

I have no idea what a matte ink set like NK7 will do on OHP, sorry. I
can extrapolate from using Epson MK to increase density on transparencies.

Lowest platten gap, the film is incredibly smooth and won't cause
problems.

Drying time, as in adding extra time to each line, isn't a problem. I
didn't have unuaual tracks or scuffing.

Drying time for the print, before spraying or use, is a problem.
You'll want to dry until there's no "milky" color as seen from the
side you didn't print on. It will dry faster if covered with a sheet
of clean, white paper. I use, per Clayton's suggestion, Strathmore
"biggie" sketch pads, in the 18x24 size. 

Fragility is the problem, the matte inks don't bind well to
transparencies. It's easy to damage one covering it or uncovering it.
A couple of coats of Premier Art Print Shield does wonders, but you
have to be pretty uniform to coat so as to not cause blotchy effects
on UV processes like platinum. A coating of MIS GLOP, applied by the
printer, would be a better way to protect the transparency, if you can
successfully feed it through the 4800 twice (I've never tried that on
my 4000). NK7 in a 4800 leaves you with a free position for the GLOP.

I asked a similar question here earlier and the responses were all 
negative regarding piezotone inks on OHP.
Piezotone people are apparently working on a forumlation to stick to 
glossy papers, so perhaps in the future....?


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "rternbach" 
<RT@...> wrote:
>
> As someone who has recently converted a 4800 from K3 to NK7 inks 
and 
> does not have any plans to revert back in the forseeable future I 
am 
> seeking advice re: using OHP to make transparencies. Previously I 
used 
> my good old 2000P and OHP to make these but I'm now planning to do 
> larger transparencies with the 4800. 
> 
> Any advice I can get (dry times, platen settings, manual feed, 
after 

> coatings etc.) before my first go would be appreciated.
> 
> Thanks.
> 
> rternbach
>