The only two independent sites for ink permanence testing (I know of) is www.wilhelmresearch.com and RIT www.rit.org. In addition to this various vendors makes the own testing which I tend not to trust to the same degree (my rule of thump is usually to divide longevity by 5 <G>).
Dear Thomas
Not sure what the second web site offers...I looked and looked but could not see anything remotely like permanence testing! When one talks of permanence and fading, one has to ask what criteria is used to determine when a print has faded enough to say yes this print has faded? There is nothing on the Wilhelm site that I can see that deals with this rather important issue.
Cheers
Richard -- There are scans and there's Drum Scanning, get the advantage, get the pdf! =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
