Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Djon" <westsidemaurice@y...> wrote:
> 
> Why does a system need to apply glop in registration over specific
> tones/colors/whites? 

Because it only needs to be in places with no ink or little ink to even out the gloss differential.
 
> ...why not apply it over the entire rectangle, like spot gloss in
> lithography?  

Because it woudl increase the glop utilization enormously, running printing costs way up.

And because it would increase the ink load (or at least the "wet load") on the paper, increasing rippling and warping, and increasing drying times.
 
> If that would work it'd be much more elegant (scientific elegance =
> simple, reliable, effective).

It is more elegant, in every sense you have mentioned, to apply it only where it is needed.

> Why can't glop be put in a spray can...wouldn't it be better than the
> various clear urethanes (which don't adequately deal with bronzing)?  

They do, if you use enough. And that is because they have to completly overcome the gloss differential. Glop, applied only where needed, doesn't overcome anything, it just equalizes.

The spray varnishes protect the pritn from UV, gas, and abrasion.
 
> Glop, applied like a pigment or ink, sounds like a very temporary
> solution, even assuming it proves to be workable (like "open loop
> systems" and "profiles" and dye transfer and daguerrotype).

Are you trolling? Properly designed open loop systems are still used, because of speed and simplicity. Profiles are the only way to print accurate colors.

Ciao!

Joe