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I've seen the very same ink brand on the same press type but at different print companies print differently! It depends on so many multiple factors, such as temperature, fountain solution, rollers, plates, blankets, paper, operator. The selection of a raw material or consumable must be done...

"To Be or Not To Be" There are some great debates on this forum, that go back many years, about to use Linear or Raw plates. Not trying to change the topic but a similar debate is should I dress my press with brand new blankets or as is condition blankets.

There is a newer way to measure Tone Value (TV) not using densitometry with Stats-T wide band filters (Kodak Wratten #25R, 58G, 47N) but using colorimetry with CIE XYZ. It's called CTV for Colorimetric Tone Value, also known as SCTV where SC is Spot Color. It works on any/all colors, process...

Maks, The photo looks correct for percent size area coverage. Round dot shape does NOT touch adjacent dots at 50% but at about ~68%. So, double check you spectro-densitometer settings and measurement that says your 5% is measuring 14%. I would trust the plate reader dot size area measurement...

It's very unusual to get the same Tone Values (TV) for each C,M,Y,K ink at the same Solid Ink Density (SID) of 1.52. Which color was this for? I assume the TV data you provided is for a printed press sheet, how does the linear plate TV measure? I think you need to check a few things with...

Always "look" at the halftone dot structure under a magnifying glass for any potential issues, distortion, deformation, doubling, etc. Don't just "blindly" trust (pun intended) the measuring instrument.

When reading your post, I still get distracted by your use of the word "paint" while you also intermittently use the word "ink". If English is not your native language, please use the correct term. Are you the actual press operator or a supervisor/manager? If not the operator, what do they...

May I ask how old you are, did you retire? How long were you in printing? I see you are from UK.

Tomas, this question is very similar to others you have posted in the past. I suggest you use the same posts for the same problems, instead of creating a new post. I think you are from Slovenia (east of Italy). A better term then "paint" is "ink". Is the "X" roller really a "Bridge" roller or...

Was last post supposed to include a color-coded graphic of rollers? I'm still confused about original post using the term "fiber" roller? I assume it meant "textured" finish, not the composition material.

I'm not familiar with a "fiber" rilsan roller? In my earlier reply, I thought you might have an old style cotton cloth molleton roller or paper sleeve in the dampener? The only rough texture (fiber) rollers I know are soft rubber, like a "Hickey Picker" form roller. Regardless, to answer your...

Also, the cleanliness of the reflectors where the majority of the light comes from. You can measure total UV output with color changing (photochromatic) labels you can stick onto the substrate web. Are you having a specific problem or is this just a general statement you wanted to share. If a...

The technology for "photo" printer (drugstore kiosk) is dye sublimation (solid>gas>solid, without liquid phase change). Under a magnifier, it looks similar to photographic continuous-tone, not halftone dots. Dry toner powder (electrophotographic) has an advantage on uncoated papers because there...

Wider strip is more pressure. More pressure is less transfer between nip. What is "Fiber" roller? It's not a molleton cotton cloth? Do you have a diagram of rollers to show?

Tolerances are bi-directional. It's not + or -, it's + & -. So, you can be a dE = 2.0 one way (warmer) and a dE = 2.0 the other way (cooler), both in tolerance, but when compared them to each other, it's a TOTAL dE = 4.0, out of tolerance. For example, at the butt edge of a folding carton or...

I recall Frank Romano from RIT had good data about this? Impressions may be misleading because of width of sheet/web and circumference of plate cylinder around. Maybe better metric is # of A4 pages? Press manufactures (Heidelberg) may have good data?

In 2019, the Bureau of Labor Statistics (BLS) decided to stop tracking "Commercial Printing" subsegment because it became too small. BLS's North American Industry Classification System (NAICS) code for Printing Industry is 323 See article in Printing Impression magazine. Printing Impression...

Source is Bureau of Labor Statistics. The "Good Old Days" was prior to 2001.

In 1997 RIT had a Kodak Nexpress, Indigio, Xeikon and Heidelberg QuickMaster DI in their Printing Industry Center (PIC) lab.

See my post from Feb 11, 2023 when Erie Community College (ECC) in Buffalo, NY deactivated it's printing program. I taught lectures and labs there for 15 years. Being so close to Rochester (60 miles, 1hr), several students transferred to R.I.T. to continue their higher education.