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Letterpress will look very similar to flexo. Intaglio can also be identified by tactile touch, feel. It has a raised surface, but not the same as thermography or screen.

Orange as a spot color is unique in that when you print at various ink film thickness (IFT) or solid ink density (SID), the color's hue changes. Thicker and darker is more red. Thinner and lighter is more yellow. I used to have all the ink draw down samples and spectral curves and CIE Lab...

Sorry, I don't understand the question? Are you asking where to position the spot colors on a 4/c process press? If only 4/c, I would put the spot color in the most similar color unit so wash up time doesn't require a longer "color" wash. Red's into Magenta. Blue's into Cyan. Orange's into...

Did you ever consider that if you idle the press between pulls, for that 2-3 min that you are adjusting ink keys, the oscillator/vibrator rollers are evening out the ink key settings. Then when you start back up it's taking time and sheets to show the actual ink setting from the fountain blade...

Variation is the result of change, either known (ink key adjustments) or unknown. Variation is the opposite of consistency or stability. All should define a duration or period between sheets. A common interval is every 500 shts. Any press stoppage will immediately cause color variation since...

Just to rule out some software setting in the densitometer/spectro, are you using the same device to measure, not the brand or model but the same device?

Yes, download free software from X-Rite to operate i1pro. Then download free XLS file from Idealliance to measure media wedge.

Can you provide more context? Is this in regard to Idealliance's G7 method? Measuring the dE at the 50% screen tint?

Do these rip marks exactly align up with the front/head stops?

With today's automation and technology (digital), printing is a manufacturing process, using science, very little "craft" or manual labor left. True in prepress and press, less so in finishing (emboss, stamp) and bindery (cut, fold, stitch).

BetaScreen.com Presto instruments

Photos are die cut and don't know direction of press sheet through press. Your "waves" may be roller streaks, bands? Can you show the actual press sheet with gripper edge? How many colors of what, process or spot (Pantone)? If spot, how many hits? To isolate dampening roller streaks from ink...

We seem to never have time to do it right the first time, every time, BUT we always find time (usually over-time) to rerun, remake for a customer rejection. Short-term, temporary, band-aid "Fix" the problem or real scientific method trouble shooting and problem-solving for root cause analysis...

Probability of color deficiency in men is about 1 out of 12, 8%.

The middle photo is NOT hot foil leaf stamp. When you zoom in on the photo, you can still see the paper texture. The dies and pressure would flatten those areas. I agree it looks like gold thermography.

Try to keep the paper grain direction parallel with the backbone or spine. Saddle stitched should be fine because paper is somewhat free to move a little. Hotmelt perfect bound is "locked" in.

Gordo's website does a fine job of explaining the difference. Brightness is just how much blue light is being reflected. It's an optical property. Printers care more about how it runs, no feeder trips in sheetfed, no web breaks, no, no jams (digital cutsheet).

Paper has both physical and optical properties. The physical one's effect functionality, runnability, and printability. These are things important to the printer because they effect productivity and profitability. The optical properties are about appearance, and more important to the customer...

I had some data from newspaper, but that was 37lb (24x36"), .002 mil paper. Looking for an industry benchmark, how many per n/100 rolls? Web breaks do occur!

Hello PrintPlanet, I was wondering if any of the heatset web offset printers can provide any stats on % web breaks? Using older Butler zero speed vertical festoon splicers. Better still, how long are you down before you restart saving and how many feet did that take? Most common basis weight is...