GMG vs EPSON 9900 - Spot Color Tolerances

[Kido]

Hello

The EPSON 9900 is praised for its extended gamut, which should lead to improvements when reproducing spot colors.

I have been told that…
95% of the spot colors could be printed within a tolerance of ∆E 2
98% of the spot colors could be printed within a tolerance of ∆E 5


Could anyone confirm these percentages?
And what are the target values that GMG used for ∆E calculation?

I have been searching for some sources, but without succes.


Thanks in advance

[venkatnagu]

hello Mr. kido

This is venkat i know gmg lab target values, if iam free tommorow i will tell u...

[chevalier]

I'm using CGS-ORIS and not GMG to drive an Epson 9900 (also using CGS-ORIS paper). I'm able to hit all but ~3% of the Pantone+ coated book within 3dE 2000.

[TerryWyse]

And what are the target values that GMG used for ∆E calculation?

GMG would be using the "official" L*a*b* values from Pantone as their target for comparison.

I can't confirm or deny their numbers. The gamut of the 9900 is what it is (depending on media of course) so I don't believe you're going to see huge differences, assuming these claims are true, between the different RIP vendors.

Terry

[Kido]

Thanks for the help so far.
@ Venkat: how will you provide me the values? And what's your source for the values? ISO standard or something?

Maybe we have to wait for Pantone Live for real Lab based spot color matching…

[venkatnagu]

hi,

CGS-ORIS paper may not be give a accurate result, iam sure technova paper gives a better result(B'coz we are using technova & novatech paper).

All the Best

[venkatnagu]

We are using lab values according to the ISO - 12647

[sasa311027]

I have been told that…
95% of the spot colors could be printed within a tolerance of ∆E 2
98% of the spot colors could be printed within a tolerance of ∆E 5


Could anyone confirm these percentages?

L24.jpg L37.jpg L50.jpg L64.jpg

White points - 3640 "Lab values" from Pantone's patches measuring.
Paper - EPSON S042003, Printer Epson 9900. RGB-output profile, without any RIPs, driver only.
I think it can help you.

[Kido]

We are using lab values according to the ISO - 12647

Does ISO12647 describes tolerances for spot colors?
I thought it was a guide for CMYK.

What are the tolerances then?


Thx!

[Johu]

hi,

CGS-ORIS paper may not be give a accurate result, iam sure technova paper gives a better result(B'coz we are using technova & novatech paper).

All the Best

Do you have some sort of proof about this. I mean it is pretty odd to throw such an allegation up in the air that CGS paper may not give give accurate result, just because you use technova paper???