'Blue Boy' 2.5 x 3.5 inches
Mixed Media on paper.
When I started producing my own prints I was very concerned about their longevity.
I bought a printer that uses Epson UltraChrome K3 pigmented inks and I always use an archival paper but I still had no definitive figures on permanence.
However I have now discovered that Henry Wilhelm has researched the longevity of different inks and surfaces.
The website is an absolute mine of information for anyone wanting to find out how permanent combinations of ink and surface are.
The website is http://www.wilhelm-research.com/
There are different ratings depending on how the prints are stored, for example:-
Prints framed under glass
Printsframed with a UV filter
Displayed prints not framed
Tests have also been done on the following:-
Unprotected resistance to ozone
Resistance to high humidity
Resistance to water
Are optical brightners present
There is a lot of information how the tests were carried out and a note that in some cases they are ongoing.
The pdf file for my printer was 9 pages long.
I'm pleased to say that it very much looks like my prints will not fade for very many years however they are stored.