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Thanks for that, makes sense. I had also been told that the shearing forces in the ink creat heat but is there enough there to cause temperature rise?

In connection with my other topics here.. http://printplanet.com/forums/sheetfed-web-offset-discussion/30330-presstek-52di-info-sought And here... http://printplanet.com/forums/sheetfed-web-offset-discussion/30424-presstek-52di-users-please I am looking for assistance from other waterless...

Our shop is all 5000k but fluorescent, LED was not around when we fitted out now we can't afford to upgrade as the payback is quite long but very worthwhile doing. I would go slightly to the warmer side but not much.

Ink guy has finally been, taken samples away. He feels that because it only occurs at the start of a new set of plates, it is pointing strongly to the plates themselves or the development system on the press. Back to Presstek now.......

HI mutti, the instructor will not be back , we have been running for about four years now :) I tried wiping the new plates with alcohol, no difference, there was no visible contamination before i wiped and wipe was clean after. The clean-up rolls are stored as suggested - on a level surface...

I am trying to find out what inks everyone is using on their Presstek 52di, also what roller temperature setting, if you could let me know the following answers it would be very much appreciated. What inks ? What temperature ? Do you adjust temperature during the day ? Do you run to any...

Well, Friday I had a long, fast running day, eight runs of 8000s at 8500/hour, plate cylinder started off at 15c and ended up at 35c. Plate toning during start-up happened after the plate reached 23c and got progressively worse as the temperature rose, But only ever at start-of-run never during...

Thanks mutti, The rollers were recently changed and properly set for no side play so I'm confident that's not the problem. Interesting you mention the heat shield, we were taught by the trainer to leave it up. Anyways, I ran for a whole day with the IR off and it still toned at the start of...

Are you saying 20M as in 20 million?? If so i would have thought that sort of job to be far better suited the B1 press guys. I have not heard of Toyo Ex, but i recall that the Toyo LZ/MZ were too fast drying on the rollers and also had serious problems with paper picking and transferring to the...

Update The unit is now fully tested and even running a mk2 version now with a custom interface circuit to the press i built. Control is very good, generally to within +/-1c, power usage is lower than manual control and warm-up is faster, overall a 100% success. The controller with recently...

Yes we had the problem before roller change, I was hoping it might help. I will try an alcohol wipe before a run this week. No crashes, never even had a wrap-up, plate and blanket cylinders do get warm, will measure them as well. I recall we used 23c when we had toyo too, it was the...

Thanks mutti, The machine is very well maintained, has had two Presstek services in the last 6 months and all mechanical aspects are 100% by the book. All ink units were recently stripped cleaned and rebuilt, some with new forme rollers, the chiller unit was serviced 6 months ago, roller temps...

Many thanks for the reply, we found that with the Toyo set, we would have to adjust the chiller to a high temperature in the morning and then lower it throughout the day, when cold the black picked very badly and when hot the cyan and magenta toned very badly. There was no happy medium and the...

Excellent, thanks for the reply. Now for the inks question, it seems i am the only person running this ink set :) Dave

Does anyone here know if the plate cleaning wipes used in the imaging system on the 52Di contain silicon oil or not?? Also is anyone out there running this press with Stehlin-Hostag "Reflecta Dry" inks??? Thanks

An extract system near the source could work, a duct at each side of the delivery maybe? Sounds like a hell of a lot of powder though? Are there health aspects here as well??

I run a waterless DI press, on a glossy art paper style job, I would expect to get at least 5-7k before a blanket clean is needed, I can push it further, maybe 10k if it's not a mega quality job. I use IR drying and very low powder. On uncoated stocks, it's generally less due to paper fibre etc...

Hi Gordo, sorry to butt in, I have tried to PM but its not working, I am putting together a small hints & tips booklet for a specific press and was wondering if there were any way possible that I could be allowed to include three of your excellent RE:Print cartoons in it. This is not a...

uh oh! Don't believe the hype too much. Contact other users for more info in real-life usage.

We have run spot colours on our DI, no problem there ;)