Recent content by SteveSuffRIT

Are you trying to register fit 1st pass to 2nd pass same side or is 2nd pass backside not register fitting to itself? If it's a 5/c, can you use 1st unit under impression to flatten out paper? Is paper grain long? Is paper flat or is it wavy edged (outer length is longer than center)?

The old GATF had a target of diagonal lines in front of a solid bar. Excess dampening (flooding, washout) would leave a low density "ghost" in the solid behind the diagonal lines.

Some mfg user guides often include recommended PM schedule by daily, weekly, monthly, quarterly, yearly.

Microphotos were very helpful in explaining problem. Dot distortion looks more like a ghost double than an actual slur (elongation). It is directional, diagonal, but from top left to bottom right. I would guess paper distortion (wavy edge) would be from lower left to upper right) as it fans out...

Are the 4 out forms (files) all the same or are they different, a combo gang?

Previous: "It's incorrect to say that the CMYK color gamut will not meet colour simulation for spot colours. some Pantone colours are easily reproducible using CMYK process inks, just not all PMS colours." It depends on your definition of "close-enough" or "good-enough" color match! For a...

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?