Recent content by ddonevski

@DeltaE Sorry for the late response, I haven't visited the forum for quite a while. Yes, that's how dynamic software works generally. It is more conservative in low area coverage regions and applies lower replacements with K there to avoid graininess. In places with low area coverage (light...

In that case spectrophotomrty for process control does make sense.

As far as I know.. I remember reading some article on this topic some 8 years ago. It was about spectrophotometry used in process control. I don't remember the details, but since some machine builders were equipping their machines with spectrophotometric devices and advertised it as an advantage...

It's been a while since I read the G7 Specification, so I'll write what I remember. It defines: 1) Tonality 2) Gray balance As arossetti said, the Spec has no standard densities or Lab. It is not intended to align different devices to some standard behavior (like ISO12647), but to achieve...

If the inks were ideal, C would completely absorb red wavelengths and would not absorb any of the green and blue wavelengths (perfect CYAN). Similarly, perfect M would completely absorb green wavelengths, and would not absorb any of the red and blue wavelengths. Mixing perfect C and M would...

As I said in earlier post, for Colorimetric intent, out-of-gamut colors are mapped to colors at the gamut boundary. All colors at the boundary are primary or secondary (+K for darker ones). That's why M=0. You won't find tertiary colors (C, M and Y all greater than zero) at the boundary. I'm not...

As Jason said, using Perceptual intent makes sense if your input contains such extreme out of gamut colors. If it's important for You that Relative intent also provides the result which you expect, maybe you have a choice of different gamut mapping algorithms when creating profile. As you can...

Averaging measurements is always recommended since it reduces measurement noise. This reflects in better "round-trip" results agreement. The round trip for this profile, as reported by SampleICC Profile Dump utility does not seem too bad. SampleICC is a free library you can download from...

So your profiles are different profiles made by some profile creation software?

Oh... if so, it makes sense :)

Okay, but profiles are meant to describe the behavior of one particular process (printer/press, substrate and ink). Applying different profiles to one printing process does not make sense since profiles are meant to characterize particular processes. For example, for a given aimed CIE L*a*b*...

What do You mean by profiles You have been experimenting with? An ICC profile characterizes a given printing process. There exist standard ICC profiles, which can be applied to printing processes aligned to ISO 12647 family of standards, Gracol or SWOP specifications, and so on. If your process...

How does this contradict my statement? We agree that they (UCR and GCR) differ in how far from absolute neutrals they introduce Black. UCR operates in near neutrals and is therefore a subset of GCR. GCR takes it (in addition to near-neutrals) a little further and applies black farther from...

I'm not sure if I understood Your question correctly. I suppose You are commonly using some ICC profile (custom or standard) which characterizes your printing process. ICC profiles already use UCR or GCR to some extent. The thing is, we only need three variables (CIE L*a*b* or XYZ) to specify...