Graeme Rowatt wrote: > 2.) As my friend would like to sell these prints I am concerned that mixing > ink/paper suppliers may have an effect on print life/permanence. In addition > to the unusual disclaimer regarding "bright sunlight" and "humidity" are > there any other issues to consider.
When you "mix and match" ink and substrates from different vendors it will most certainly be almost impossible to obtain permanence data for the chose combination. For example on an IRIS on one specific inkset and a certain paper you could get upwards of 80 years, change the ink or paper and you could be looking at months instead... 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>). Making accelerated permanence or fading tests involves subjecting a print to atmospheric conditions (light and humidity) in amounts similar to what prints would be subjected to under various circumstances. Such tests take time and therefore cost money. Consequently you are unlikely to find tests being done with inks and paper from various vendors (although exceptions occur). The reason is simply that it is not in either vendors best interest to test their consumable with a competitors as they all live from selling just that consumables. Also if you try to add up how many tests you'd need to make if you gather all the earths inkjet substrates with all the ink types in the world, you probably agree that you had a a substantial piece of work lying before you... If you want permanence for your prints have a look at the above mentioned websites and choose from the available samples when you decide upon your printer, ink and paper... Best Regards, Thomas Holm / Pixl Aps - Photographer, Educator, Colour Management Consultant & Seminar speaker - Remote Profiling Service (Output ICC profiles) - www.pixl.dk � Email: th[AT]pixl.dk -- =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
