Recent content by SteveSuffRIT

Here is a simple test to isolate the plate from press. Take a new plate, on a flat surface, ink it up by hand. Use a wet sponge to dampen, then a hand brayer roller to ink up, but do it horizontal/lateral across, not vertical around the plate. Visually inspect for any lines. If no lines, then...

CIP3 (Cooperation of Integration of Prepress, Press, and Postpress) was formed in 1995. The current standard is called CIP4 which includes other processes (front office). It's now part of JDF (Job Definition Format) The RIP (Raster Image Processor) or DFE (Digital Front End) produces a Print...

GATF/PIA use to publish the "Printing Trade Customs" document that informed customers of normal policy and procedures regarding print production practices. Color Variation was always listed as "Commercially Acceptable."

My comments are in red color. For offset printing, is there an industry standard Delta E to determine if the amount of color shift is acceptable? Industry "norm" is a dE <=2.0, but depends on market segment. Tolerance limits should be mutually agreed upon by both buyer and printer, not just...

Ascott: If I can get a baseline, I can unit-test the software's output against our actual pressroom ink consumption logs from last month. Your estimating software should "model" real production data. Use your historical ink mileage consumption data as the baseline reference. You know the 1) #...

I assume you are: heatset web, using solvent based inks, not coldset absorption inks, also have a 3rd ink mileage factor for uncoated paper, besides coated and newsprint?

Tools of the Schedulers Trade, ..... Dart Board and Crystal Ball

Regarding the "sticking" noise, No harm, No foul! The sticking can be separated with an aerator/skid turner. At least the sticking is not creating any defective waste.

Is your concern you don't feel the powder or that you are getting some setoff, blocking, sticking causing print quality defects and waste?

3rd frame is Lab for M,Y,C.

What CMYK screen % are being used to build that gray? 50C,40M,40Y,0K? It should be built using 100% Gray Component Replacement (GCR). ~0C,0M,0Y,55K

I just noticed your related post "Consistent Color" from Sept 21, 2024.

You don't need 20 clean sheets for sampling, probably just 3. Between pulls, do you let the press idle on slow speed or do you stop it completely?

The amount of effort (time & materials) to get a press-to-proof color match depends on the sophistication of press technology. Most printers don't buy a press because it prints faster (22K sph), it's because they can reduce the make-ready (MR) time shorter. CMS = Color Management System (~G7).

Maks, In post #22 you say "I hope others can advise what seems to be the abnormal things we are encountering with our printing?". Poster "Assures" makes a comment about your high SIDs. Then you say you even sometime printer much higher! Aren't you curious about what would be your TVI if you were...