Digital BW, The Print

Peter,
> addressed by selecting the correct ink (e.g. matte black -vs - 
photo 
> black) for the paper, and by controlling the volume of ink.   Never 
> use any more ink than you need to get a satisfactory black.  This 
> varies tremendously with the medium.    

You are correct in your summation here. The bottom line for me is 
that I am attempting to use a transparency material (Ultrafine Clear 
Film - http://store.ultrafineonline.com/ulclfitr11x1.html ) that 
wasn't designed specifically for use with high ink loads and 
Ultrachrome Inks. These negatives would be used to make silver 
gelatin and alternative process prints. 

The motivation for using this product is strictly driven by economics 
in my own case. The primary product recognized as best, Pictorico OHP 
is much more expensive. In additon to that having an alternative 
material to utilize may help spur competion and prevent the total 
dependence upon one supplier, which recently has proven to be 
unreliable.

Agfa SelectJet film would be a viable alternative, but is not 
marketed in the US and most likely would be just as expensive. 

> may not realize is that inkjet ink does not dry 
> merely because it's exposed to air;  it dries as part of a reaction 
> with the physical and chemical properties of the paper, or more 
> precisely, its coating.   That's why using the exact right amount 
of 
> ink matters.

Thanks for reiterating that point, but it isn't clear to me why some 
of Epsons own products exhibit the pizza wheel effect. 

Of course the pizzeria wheel marks are absent when using products 
that are printed with wide bodied printers designed to transport 
media with a vacuum system. Switching to these machines may be the 
long term solution.

As for Steve's question, yes I have found a way to avoid the problem, 
change media settings if possible to reduce the ink load. Anothe 
method is to install a spring on the front of the printer to lift the 
P. rollers slightly so they just barely clear the media. You can do 
this without permanently modifying the printer but must be done 
carefully to insure that the print head can still maintain laterial 
movement and normal operation. I place the spring on your left side 
of the exit throat of the printer. You may need to place sone shims 
on the right side to equalize the lift so all rollers are lifted.

Thanks,

Don Bryant