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New in the long perfector world - is it common to have different characterization plate curves for each side of the sheet when perfecting? I am getting slight variations in color from side to side, understandably because each side is printing on complete different units on a perfecting press.

We are running a UV Press, and run jobs requiring PMS colors. Can I run PMS colors with conventional inks? I understand I need hybrid rollers and blankets, but are there other issues I may into?

I have a PDF with images on it and an area with a black screen. I send the PDF through Rampage. When I view the ripped PDF on a MAC, the black screen is a black screen. When I view the same ripped PDF on a PC, the black screen is in 4-colour process. :confused: We checked the Adobe Acrabat...

Ink densities always have to be increased to achieve good colour, match proof especially black solids when running overall matte AQ coating. The problem is dot gain goes from say 18% to 25% for C,M,Y and from 20 to 35% for black, so the screens look much darked than the proof while the solids...

Mottle appearance when printing Pantone colours on offset stocks. We tried three differennt ink manufacturers, different blankets but very little change. I've seen printed samples where colours lay down smooth on offset stocks, what's the trick? Premium stock will do it but is there anything...

Running a newer 29" Komori, and the dampener chrome rollers continually are getting sensitive. It happens on the run, but more so if there are frequent feeder trips. When this happens, we get scumming on the sheet. It can happen to any colour. We've tried different fountain solution (monitored...

I've recently damaged 3 cylinders (plate, blanket and impression) with ball bearings. Can anyone recommend a reputable company for repairs? What costs am I facing? Tambo

I recently met someone who broke out with a severe rash on arms, then spread from there. It was diagnosed as contact dermatitis. Has anyone else experienced allergic reactions to UV coating or the lamps or the exhaust, from anything related to UV? Never had a problem, worked in print shop for...

I have a 40" press without IR lamps. I seem to have repeated problems of off-set, especially in front corners of sheet. Does any know whether it would be beneficial to install IR lamps in the press? Do the IR lamps really assist in the drying, enough to eliminate off-set problems. Yes, we are...

I was looking at trying out Taniguchi Process Inks, never used them before. Does anyone have experience with these inks, whether positive or negative? jdt

Can unused fountain solution from the jug be flushed down the drain with water or is it best to send it to an environmental service to dispose of it?

I am running Sun Chemical Liberty HS, anyone know which fountain solution works best with this ink? Any comments on this ink?

In need of dampening solution pans for both units on a Heidelberg QM46-2. Also looking for a wash up assembly for unit 2, and a dampening pan roller for unit 1. Items need to be used to keep costs down but also in good condition.