Digital BW, The Print

With results published by Wilhelm, (with and without glass), the UV protection does not seem to really be that much of a factor with modern pigments. Also, most indoor display situations have minimal UV exposure.

Of a much greater concern is oxidation due to pollutants in the air. Ink jet prints need to be sealed, whether that is to put prints under glass, laminate, or liquid seal some way. Remember, the pigmented receptor inkjet coating is microporous. This makes the print very susceptible to pollutants! One of the beauties of gelatin in photographic prints was sealing the print from airborne contaminants.

It would be interesting to see studies done on the face mounting of prints on acrylic. Does the silicone or other adhesives react with the inkjet pigments over time.

John Nollendorfs

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dlruckus" <dlruckus@...> wrote:
>
> Some time ago I tested several of these.One I tried, Krylon UV clear, did indeed block UV to an extent as checked via before and after with a spectrophotometer. Unfortunately, it also slightly blocked visible blues so caused a bit of yellowing to Hilights and paper base. I don't have the numbers handy at the moment so can't quote figures.
> 
> Regards, Duane
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla <edinkla@> wrote:
> 
> > 
> > There are doubts whether UV blocking is possible with the thin layers as 
> > produced by for example Print Shield. Much more likely gas fading of any 
> > kind is blocked by the varnish.
> > 
> 
> > -- 
> > Met vriendelijke groeten,   Ernst
> > 
> > Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/
> > 
> > |      Dinkla Grafische Techniek      |
> > |         www.pigment-print.com        |
> > |                 ( unvollendet )                 |
> >
>