Recent content by glenncolorguy

Hi Jim, pressSIGN will show the operator which way to move in terms of density (up or down). Note that when in Density mode, pressSIGN displays bars showing where the press is currently..a bar below the line means that your density is too low. When pressSIGN is in LAB mode the bars will be...

Dot Gains Dropping on Press Dot Gains Dropping on Press <<in the last two weeks our dot gains on this press have dropped 5-6%, and of course there are color matching issues. Plate curve and desired dot on the plates has been confirmed, no change there. What do I need to test/check to alleviate...

UV-non UV UV-non UV GRACoL specifies specific L*a*b* values for solid inks....G7 does not. G7 is flexible and adaptable to any colorant set, so there is no need to restrict gamut, however it is unlikely you would need to do this in any case. Conventional inks generally have a wider gamut than...

Simple? or Complicated? Simple? or Complicated? The concepts involved in process control for offset are reasonably simple.....application is not. Density and dot gain may rough you into the territory...if you have accurate proofs to begin with.....but there is much more to the process...

G7 By The Numbers G7 By The Numbers Hi Donatello, You have very limited means to hit G7, but even with just a densitometer, you can do tolerably well. GRACoL has specific paper requirements (Flo is a good match). but G7 is adaptable to a range of paperwhite points. G7 and GRACoL no longer...

Tolerance Tolerance Right,there are "official" tolerances but in the end it is really an individual issue. Probably the best approach is for printer and buyer to agree on reasonable tolerances beforehand.

Remote Press Checks Indeed, ICS did pioneer this idea several years ago, but the idea of a subjective eyeball-based remote press OK is still fairly exotic and subject to some pretty rigorous requirements on both sides. For most printing requirements, a more accessible approach is for the...

Intentional Ignorance Intentional Ignorance This is really the central problem, much more than UV vs Non UV, and certainly deserves its own thread. The print industry has drifted over the years into permanent crisis management mode, ignoring the larger view and never thinking in terms of...

OB's, UV, job stock and characterization data OB's, UV, job stock and characterization data Mike, It is true that simulating GRACoL C1 with an OB paper is tricky. OB's confuse the process in unpredictable ways. But most "real" #1 sheets contain OB's and strong -b* values. Matching...

UV Cut Confusion UV Cut Confusion For some reason, proofing manufacturers almost always supply UV cut devices withe their systems (probably because from a scientist's point of view it seemed like a "clean" approach at the time). Unfortunately, such readings often don't correspond to what we...

EFI Rip and G7 Certification EFI Rip and G7 Certification Bear in mind that G7 Certification tolerances apply to G7 certified proofing systems, not necessarily individual proofs. In other words, in order to become a G7 certified system, the manufacturer must demonstrate that the system is...

G7 and the Kodak Nextpress G7 and the Kodak Nextpress The Kodak Nextpress is designed to be color managed using profiles. Yes, it does drift, but this is true to some extent of all printing and proofing devices.

Dot Gain Compensation_Profiles Dot Gain Compensation_Profiles This is the correct approach, at least to a point. Profiles for proofing and simulation should reflect actual printing conditions, so if you are using a negative curve in your platemaking process to reduce dot gain on press, this...

Re: Man Roland scanning densitometers I'm afraid that the Status E readings on the Roland don't line up with Status E from a 528. It may be the Roland's polarization filter, I'm not sure, but the Roland readings will be quita a bit higher (About 2.0 on average) in all 4 colors. Best approach...