Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Ernst Dinkla"
<E.Dinkla@c...> wrote:

> In the past I have asked how a null printer profile is created
> but never got an answer.
I suspect my knowledge falls just short of the easy solution. Editing
the header in a working space profile from mntr to prtr doesn't seem
to work.
Look at it this way, if the profiling software sees exactly the same
measurement numbers as the color data in the target file, it should
create a null profile. I have yet to take this very far, but you get
the point.

Another possibility is that the canned Epson profiles seem to have
some sort of shell profile called "standard", then setting specific
sub profiles. The 3000 or example installs SC3000 Standard, then
several related to media and resolution such as SC3000 PQP_1440. This
"Standard" seems to be equivalent to ColormatchRGB, but is a printer
profile. I haven't tested this thouroughly but it seems to be true. If
you can deal with your null profile having a gamma of 1.8, or can then
edit it to an more useful overall gamma, you can use it as a base null
to edit curves into. It works.

>...is it possible to write a tool that translates
> spectrometer or densitometer greyscale data into a PS curve ? If
> it doesn't already exists.
It certainly seems possible, RIPs that have linearization features
built in, that support measurement devices directly, seem to do
something very similar, just perhaps not  a PS curve specifically.
Will they export a .acv curve?

> Any flaws in this concept ?
Only if it doesn't work <G>

> There's profile creation software that can change a normal colour
> profile into a so called "Rich Grey". It is used to get more
> neutral prints from colour printers by taking out the colour data
> of the colour profile (if I did understand it correctly). I got
> some samples of profiles and menu screenpics probably from
> Richard Millott on the Colorsync list. www.ICCtools.com is the
> company, the software is ICCtoolbox pro. The profiles have an
> extension pf but they are cmyk printer profiles, I can't place
> them however. Anyone familiar with that application and the
> profiles ?
I've downloded it and tried it briefly in demo mode. I tried making a
gray profile from a CMYK profile of a quad setup. It did work, and
will load and preview, very cool. Just haven't found a way to put it
to good use yet.
Way too many irons in the fire.
Tyler