Digital BW, The Print

On 1/4/05 3:51 PM, "joejx8" <joejx8@...> wrote:

Hello Joe,

My email is just back up...

I¹d to say Thank you to Antonis, who has been helping while I¹ve been in a
DSL nightmare.

I like to add..

With Linearizing with a scanner,  I¹d agree with Antonis, that either a
Spectrophotometer or a Densitometer will give you the most consistent
results.  When using a scanner, you have other factors that can interfere
with your results.  How you scan it, how you set your white and black point,
how much USM you use ect.

The way the  ³import scan² tool works, is once your print out an internally
generated Target ( target for linearization).   This you scan on a
reflective scanner, with no USM and not to clip either white point ( paper
white) or the Black point (step 26 max black).  This file you scan and in
IJC you open the file into the ³import scan for Linearization².  Once open,
you select the the 26 steps ( paper white to max black),  IJC will then
display the RGB values of the selected area.  These values are then used to
generate a linearization.

So the cleaner you scan, the more accurate the results.


Joe Berndt


> Thank you so much for your answer. It helps a lot ! I'll follow your
> advices.
> 
> Best regards.
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Antonis"
> <antonisphoto@y...> wrote:
>> > 
>>> > > - is IJC/OPM really a viable solution for somebody without a
>>> > > densitometer
>> > 
>> > Well, my standard answer is that you can get by, but don't expect
> the
>> > accuracy of the meter. I should try the two methods side by side
> before
>> > I pass judgment - and I haven't. I will do it for this new PC
> version in the
>> > near future and post my findings.
>> > 
>> > 
>> > 
>> > 
>>> > > - How long do you think it could take to build a correct UC 8 ink
>>> > > profile (I own an epson 4000) from existing one assuming you've
> fully 
>>> > > read the manuals and have basic knowledge on curves ? few hours ?
>>> > > more ?
>> > 
>> > 
>> > I can only answer based on my 2200. In any case the 8th channel
>> > is not being used since it has the second black. If you already have
>> > a profile (and there are plenty for the 7-ink UC) it should be a
> matter
>> > of an hour or less depending on what you are trying to do.
>> > 
>> > If you are just linearizing (which should easily adapt a 2200
> profile
>> > to the 4000) it should be under a half hour. If you are tweaking the
>> > coloration (toning) it could be a few hours until you get something
>> > you personally like. But that's not so much a function of the
> software
>> > as it is a creative trial and error to see what works for the look
> you want.
>> > 
>> > The part that takes the longest is the tweaking of curves. But
> because
>> > of the linearization engine, it can be pretty forgiving. You want to
>> > bring it in so that it plots "close enough" and then lin takes over.
>> > The major decisions that are made in the curves are things like
>> > when should the next ink come in and what to do not to overload
>> > the paper with ink and loose dmax or definition along the scale.
>> > Or, how to use the color inks to tone the scale, etc.
>> > If you are new, and starting from scratch,  those things can take
>> > a day or two to become familiar. But that should never be the
>> > starting point for anyone new. Any of the existing profiles
>> > will have these issues resolved - and that should be where you
>> > start.
>> > 
>> > Still, I'd allow time to read the manual, play a little with the
> controls,
>> > and then go to a real profile. It could be a day if you think of it
>> > that way. On the other hand, once you get experienced, making
>> > moves on a profile and repurposing it could be a matter of a
>> > few minutes.
>> > 
>> > 
>> > Antonis
> 
> 




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