Dry back problems with Toyo Inks

We are using Toyo Inks to produce specials colours to tight Lab compliance. My printers are achieving good DE0.5 values when printed but are finding a significant dry back that takes them way out of tolerence 3-4 days later. Any ideas please?

 

is the sheet Aqueous or UV coated?
When we did our press we ran the samples about .05 points heavy and checked the ⌂E with dryback a few days later to determine our wet densities.

 

Hi Jaed
Thanks for the reply. We are applying a matt varnish and not using a coating on these colours.

 

theres your answer. Matte varnish will soften up densities a bunch when dry.

 

Yes makes sense thanks guys!

 

I've also found that tough tex series of toyo ink drys back much more than other series of toyo product. Is it tough tex that your using?

 

Many thanks for the reply problem solved now by changing suppliers