spots.. ink flying. QM46/2.

[Swifty2]

haveing trouble with Certain pantone inks throwing spots...usualy anything with transparent white ..but today pms 383 is killing me
my hard rollers are not in great shape. but they are not glazed and I have proper stripes !
so what inks do you all use that are LASER SAFE!!
and what fountain soultion do you use.. and what have you adjusted your mix to?

My polyplates are are clean..ink is being thrown... I have tried Aqua varnish #30 and a couple other miricle cures that cause more troubles then they fix..

 

[Swifty2]

found two possable causes.. 1- the ink sucks
#2- water ph has jumped up to over 8.... my fountain solution up to 5.5 ...from 4-4.5

 

[blueslal]

I assume its misting? too heavy ink flow? ink viscosity,what kind of ink? your ph is off? what are you running as a solution? Did this problem just start? keep a log when using new ink, fountain solution etc. Have you decalcified rollers? You prob realize you have to eliminate the variables and find the constant. thats the nut.

 

[Swifty2]

only constant I see is possable worn form rollers...they are swollen ...in the middle... this is a first for me ..as I have always seen the ends trumpet ...hoping this is my problem, ordered new ones
my ph from tap is 7.5...5.0 in my water bottle
been running AB dick mega or universal pink for years
ink is from per-tech
the problem showed up a couple years ago during a hot summer and comes and goes driving me nutso LOL