QTR-Quadtone RIP

Hi Fabio.

I suggest you read through a great article that Keith Cooper wrote called
"Better black and white with the ColorMunki". Don't let the title fool you.
The article is all about using the QTR icc profile tool to linearize your
ABW black & white prints. Simply adjust the process as appropriate for
Spider3Print.

http://www.northlight-images.co.uk/article_pages/bw_printing/bw_print_colorm
unki.html

While I normally do my b/w printing using QTR itself and dedicated
monochrome inks, I have used this approach to successfully linearize Epson
ABW output as well as Canon's equivalent on the 8300.

BTW, if you have a spreadsheet you can use it to check your final output and
make sure it's linear. Make a step-wedge print using a profile you created
and then read the values. Graph these values in your spreadsheet, taking
care to set Dmax and Dmin as "0" and "100". You should get a straight line
with no bumps or curves.

I'm not sure I fully understand your comment about seeing "no color
changes". If you mean in your output, all that Create-ICC will do is to make
your print linear. It will not change the tone. You will have to use ABW to
do that. If you're talking about soft-proofing, drop your profile text file
onto "QTR-Create-ICC-RGB". This version of Create-ICC will use all three Lab
values and it will create a profile you can use to soft-proof the "tone" or
"color" of your b/w print. QTR-Create-ICC will create a profile that will
only show you luminosity values (i.e. no representation of paper or ink
color).

Best,

Terry.

On 11-07-21 12:39 PM, "HalfCameraGeek" <fabio@...> wrote:

> Hello,
> 
> I've been evaluating he ICC profile creation tools of QuadToneRIP and
> trying to understand my results with it. My interested is specifically
> in the profiling tools, so I wanted to try it before buying.
> 
> I was able to successfully profile my Epson 3800 using ABW mode and
> Canson Infinity Baryta 310g/m2 paper, but the resulting profile seems to
> be almost neutral. Soft proofing with it gives me no tonal changes, only
> paper / ink color simulation, and prints of the 21 step target show
> roughly the same values as before profiling.
> 
> I've done a fair bit of homework before coming here and the only
> explanation I've come with is that my printer was pretty linear by
> default. I've used the Gray gamma 2.2 target provided by Paul Roark,
> since most of my images are in AdobeRGB colorspace and I print a lot
> from Lightroom. Using the original untagged target from the Eye-One
> folder gives me the same results (almost no change by applying profile),
> but a totally different gamma curve, as expected.