jimvolkman
New member
I am printing 4-CP (UV Hybrid) plus UV Varnish inline on coated side of SBS. Have some pretty good solid black areas, black printing last before the UV.
Have run this order a fair amount over the past 2 years. In the last month or so I find that the areas with solid black seems to have a duller, almost pitted look after the UV Varnish is applied& cured, compared to the gloss over the other colors and the non-printed areas.
In fact, I found out by measuring the gloss level that it actually is declining (over the black only) by about 10-15 points when measured 24 hrs after printing.
I am looking into a number of possible causes, but has anyone heard of or dealt with this issue in the past and have any advise or cause so I might narrow my search.
I have tried changing paper, ink sequence, running faster, slower, putting trans white over final print (prior to varnish) and have not seen any dramatic improvement.
THX in advance for your support.
Jim
Have run this order a fair amount over the past 2 years. In the last month or so I find that the areas with solid black seems to have a duller, almost pitted look after the UV Varnish is applied& cured, compared to the gloss over the other colors and the non-printed areas.
In fact, I found out by measuring the gloss level that it actually is declining (over the black only) by about 10-15 points when measured 24 hrs after printing.
I am looking into a number of possible causes, but has anyone heard of or dealt with this issue in the past and have any advise or cause so I might narrow my search.
I have tried changing paper, ink sequence, running faster, slower, putting trans white over final print (prior to varnish) and have not seen any dramatic improvement.
THX in advance for your support.
Jim