The standard describes the spectral energy distribution of the D50 illuminant between nm and nm in increments of 5 nm. The metamerism index defines the quality of the spectral simulation of the D50 illuminant by the respective light source in the visible vis and UV ranges. Natural daylight contains a natural UV component, which excites optical brightening agents OBAs in printing papers. As a result, the OBAs have an influence on colour rendering. This amendment meant that the UV component in standardised lamps had to be substantially increased.
The new conditions for standardised light make the influence of OBAs in production paper visible, thus allowing them to be controlled using the classical methods of colour management. The permanently controlled D50 light conditions to ISO are an indispensable link for practical implementation of the Process Standard Offset. In addition to the demands on the spectral quality of the light, stringent requirements are also imposed on the illumination of the viewing surface and the ambient conditions.
Different brightnesses subjectively lead to an incorrect colour impression, and this can possibly result in expensive misjudgments. So by bringing it into So, you know, all parts of the standard are being looked at, but the big significant add to it will be this edition of the near neutral.
Yeah, G7 is a branded name, right? I mean, G7 was released quite some time ago, and near neutral. And so this is the evolution of the process. No, because that drives people crazy, right? So you look at the changes in GRACoL, or the changes in some of the other specified printing stuff, because we introduced M1 measurement, right? So that changed some things that go on there.
So all those pieces work in concert to say, at this point in time, this seems like something that the world can agree on, that is an improvement for graphic arts. And it is that challenge. We, here, may have said, I knew that! But it really is a world agreement, and that is one of the challenges, is we need to get that level of agreement so that when we talk about an ISO standard, everyone in the world can say, Yeah, I can do that.
That makes sense to make. So that takes a little bit of time sometimes. Yeah, Ray, wonderfully explained. I appreciate that explanation, and this is why we wanted to have you on. So stay tuned, listeners.
Next week we have Ray on back again, and he is going to talk about additional progress that has been made in the area of specifications and standards, and iccMAX is another topic. So stay tuned to next week and Ray, thanks for sharing your knowledge with us today. If you have ideas, suggestions or would like to join us or even sponsor a future podcast, simply email me at jcollins idealliance.
GAMUT is produced and published by Idealliance — become a member today and join us in creating the future of our industry. Support the show. We provide industry-leading hardware, software, consumables and services primarily to customers in commercial print, packaging, publishing, manufacturing and entertainment. Great to have you on. How are you? Ray Cheydleur Thanks, Jeff. Jeff Collins Yeah, absolutely. Ray Cheydleur Yeah, so a long time ago in one of my former lives, I was a photographer and I made the switch from analog to digital photography.
Jeff Collins So, Ray, over the last several years, what specification, or standard, or area of improvement in quality really stands out above the rest? Jeff Collins And what contribution does the Idealliance Print Properties and Colorimetric Council provide to the development or solving some of these problems like M1 and use in practical application?
Jeff Collins And before we get too far in depth, and to the specific ISO specifications—or, excuse me—the ISO standards, or regional specifications, can you give our listeners a little idea of how the different groups work and what their roles are? Jeff Collins Yeah. Ray Cheydleur Yeah, it is definitely confusing, right? Jeff Collins Understood.
And then we have TC And what is their role? Ray Cheydleur So TC? Jeff Collins Got it, got it. Jeff Collins I see. I see. Jeff Collins So that makes sense. Ray Cheydleur Yes, CxF is an interesting animal, right? Jeff Collins And so, explain to some of the listeners what the advantage of using CxF is, compared to maybe some other measurement format. Ray Cheydleur Yes. Ray Cheydleur Oh, I think that takes better eyeglasses than I have. Ray Cheydleur Right?
Ray Cheydleur Yeah, G7 is a branded name, right? Browse or search our catalogue Search. ISO standards are internationally agreed by experts Think of them as a formula that describes the best way of doing something. For instance, Quality management standards to help work more efficiently and reduce product failures. Environmental management standards to help reduce environmental impacts, reduce waste and be more sustainable. Health and safety standards to help reduce accidents in the workplace.
Energy management standards to help cut energy consumption. Food safety standards to help prevent food from being contaminated. IT security standards to help keep sensitive information secure.
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