Digital BW, The Print

David,

Ah, resolution may still be an issue then.  I was transferring line art and 
resolution wouldn't have been so obvious as with creating negs for 
continuous tone photographs.

I used Inkpress transparency film.  Printing was done on an Epson 4800 with 
matte black and the standard ultrachrome inks.    The Inkpress media happens 
to have a multi-purpose coating which works with dye, dura-brite, and 
ultrachrome inks.  Initially it was the easiest product to get in the right 
size for my purpose.  Since then I've found other manufacturers that seem to 
be allied with the graphic arts/screen printing industry.  Most of these 
products use a microporous coating which is why you can use either dye or 
pigment inkset in some cases. As long as you've chosen the proper type of 
media for your inkset type, PK or MK inks seem to be somewhat 
interchangeable.

With PK and MK inks, I wasn't speaking technically but referring more to the 
real world end results with transparency printing - all based on anecdotal 
reports...

Sounds like you've done enough experimenting to know this, but it's actually 
pretty easy to print on the wrong side with transparency film and when you 
do that, you CAN wipe the ink off with a finger. I usually test the 
tackiness of the film with a damp finger and print on the tacky side with 
good results.

Forgive the reference, but Dan Burkholder is reknown for making digital 
negatives and uses pictorico transparency film.  He's alluded to PK inks 
being superior, but I think that's related to D-max..(again, anecdotal).  I 
have no direct experience with this transparency media since it didn't suit 
my project's budget. 
http://www.ppmag.com/web-exclusives/2007/07/making-digital-negatives.html

Some other internet links which might be helpful:

http://www.adorama.com/IJT172220.html  This is a link to the Inkpress media 
at Adorama.

http://www.americanscreensupply.com/index.php?l=product_list&c=36  This is a 
link to a Fast Positive waterproof (pigment) film vendor.

http://screenprinters.net/product.php?fk_pid=fastposfamily This link 
provides product details for both the non-waterproof (dye) and waterproof 
(pigment) films.  It's mostly sales stuff, but it provides more details than 
just prices.

http://estore.lawsonsp.com/index.asp?PageAction=VIEWPROD&ProdID=275  Yet 
another vendor of waterproof transparency media -- don't let the photo fool 
you, these films all have a slight milkyness to them.

http://news.thomasnet.com/companystory/477675  This is a product that I was 
interested in, but could not pursue because it was designed for DYE BASED 
printing.

http://www.ulano.com/ijf/inkjetfilm.htm  Inkjet media overview for Ulano 
nano-porous coated films.

I do have a continuing interest in printing on transparency so I'd 
appreciate learning of your eventual results.

-Lloyd



----- Original Message ----- 
From: "David" <dkfreed@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Wednesday, February 20, 2008 10:32 AM
Subject: [Digital BW] Re: problem with matte black ink sticking to 
transparency film


Lloyd, what brand of transparency film are you using? I have tried a
few where the MK worked, but the coating is so course, it doesn't pick
up the resolution that I need. All the ones made for fine art or
digital photo applications don't seem to work. I've seen a few brands
that were for dye inks and I've avoided those.

I'm not really looking at permanence as usually defined--I just want
the ink to dry and be permanent enough so I can't wipe it off with my
finger.

Regarding the difference between the two, I've read: "they're actually
the same pigment, the only difference is the photo black has a coating
around the pigment particles so it sticks to glossy/luster media."

David.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Lloyd Braddy"
<lbraddy@...> wrote:

> It's possible that you using the wrong kind of transparency film.

> The real difference in PK and MK inks on properly prepared inkjet
transparency lies in durability of the dried ink over time.

> I haven't had any problem getting matte black (or other colors of
Epson OEM > inks) to stick to mylar transparency film that has been
prepared for pigmented inks.

 -Lloyd Braddy



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