do you mean piling?
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sorry piling.main causes?
Last edited by eagleI; 02-27-2010 at 08:52 PM.
do you mean piling?
Picking? on the plate and blanket?
he must mean piling ??
so much for my screen name!
if it is piling the ink probably doesn't have a good flow and / or is setting to fast , could also be a paper prob or chemistry , I would gel the ink first and see if that helps , also if your running with temp controled rollers check that the rollers aren't too cold....
Paper piling...characterised by trailing edges of solids building up a deposit of paper coating, can be minimsed by gel reducer, as mentioned, and/or increasing damp and ink levels in unison.
Long runs without blanket washing and removal of the buildup can indent blankets permanently.
Depending on the severity the above can reduce or eliminate the issue but we used to have this problem with one of our monthly jobs and nothing would help until we changed the paper (for a cheaper grade!) and suddenly no piling.
Check out my flickr page: http://www.flickr.com/photos/blofeld09/
i try to stay away from gel reducer whenever possible because it tends to be a little too greasy for my liking. if you must use gel then use it sparingly. theres a product out in the market called sterling perfect print thats a much better reducer than the gel. you can use lots of it without filling in of the halftones. its an old letterpress product but works good in offset applications too. it doesnt mix in the ink as easily as gel but in my opinion works alot better
stelings used to do a reducer called thixoprint gel Which was excellent very hard to over dose with the product We used it on packaging boards Also spraying the blanket before running with a anti ink skin spray helped
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