New Product for Ink Optimization

[gordo]

meddington, have you profiled the gamut. If so, could you share it. I'd love to compare with GRACoL.

thx, gordon p

my print blog here: Quality In Print current video post: Platemaking at the Chicago Tribune - 1937

[meddington]

Interesting results. Thanks for providing them.

Can you comment on what their recommended densities are?

I am still curious about how they can obtain gamut gains and knowing their density targets would help.

Thanks.

Erik

Let me qualify the term "gamut gains". Analysis thus far is purely visual, and I haven't plotted anything yet to determine any increae in gamut...just perceived.

Recommended densities for our paper/ink were C1.60, M1.70, Y1.15, K1.80

[gordo]

Recommended densities for our paper/ink were C1.60, M1.70, Y1.15, K1.80

Wouldn't the increased SIDs account for increased gamut?

thx, gordon p

[Erik Nikkanen]

Wouldn't the increased SIDs account for increased gamut?

thx, gordon p

I would think that was the main cause for an increase in gamut but I am still curious to know if there is any other issues here.

It looks like running with the above densities is out of normal Standard values but that is OK.
I am very much against industry standards that are not really aimed at a general approach to colour reproduction but are more aimed at trying to have everything the same. Paper, ink TVI etc.

If some standardized method only works well if every component is limited to the same or like set of components, then it is kind of stupid in my mind. Standardization sounds like a good thing but it has to make sense. Standardize the results and not the method.

A good standard for the printing industry would be something like saying that a printed image has to be within +/- Delta E 3.0 of the target colour at every point in the image. Who cares how you make the image as long as you can meet the specified tolerance.

I think running at higher densities is a good idea for some kinds of work. I think the technology should be developed so that one can run at different densities or with different paper or screens and still have predictable results. And I don't mean predictable just in the gray scale as with G7 but anywhere in the image.

[meddington]

Wouldn't the increased SIDs account for increased gamut?

thx, gordon p

Absolutlet. I just meant that I hadn't had a chance to measure any targets yet to numerically compare towards another gamut, such as gracol. Ill post when I do.

Caveat. The it874 target was processed along side all other live content thru the ICE server. As such it wouldn't be a totally fair direct comparison toward an unprocessed it874 thru gracol coated.

[Louis Dery]

Wouldn't the increased SIDs account for increased gamut?

thx, gordon p

I think so.
How a conversion would make red (extend gamut) other than 100 M and 100 Y?

Louis

[gordo]

To Meddington and Ian,

My concern is that the increase in SIDs has not been mentioned before. Instead, by not mentioning the SIDs, what is being implied is that the ink savings application itself provides a "20% increase in gamut" while reducing the amount of ink being used.
It would have been more useful to see if there was an increase i gamut, as claimed, when SIDs are the same for processed and unprocessed files. Because at the same SIDs, I doubt that there would be any increase in gamut.

best gordon p
my print blog here: Quality In Print

[marktonk]

Gordo has some good points. It would be interesting to see what would be obtained using the same SIDS as a standard run for a direct comparison.

Regards,

Mark

[Louis Dery]

Agree with Gordo and Mark,

Increasing color gamut by 20% without changing ink densities…… if it is possible to make a printer to print a wider gamut without changing the print characteristics (ink density, paper, etc.), I would like to see this!

Louis

[meddington]

Honestly guys, it never occurred to me that the increase in gamut could be the result of anything other than the increase in density. I mean, all else equal 'cept the seps, what would it be if not density, though perhaps the separations facilitate the ability to push densities higher. I think you may be pouncing on an inadvertant(though important) ommision from these posts. To be fair, the guys at chromaticity were up front about this to me from the get go.