Well all this data comes from Wilhelm who is paid to do the tests by the various manufacturers . His test condition are somelight like 12 hour of exposure per day at somewhere alrond 450 flux at 60 % humidity with the print behind glass. In lower humidy he say the dye inks should last longer. He doesn't make this statement about pigment inks lasting longer in less humidity. In a message dated 8/26/02 0:57:22 AM EST, shutterbug123@hotmail.com writes: > "It varies by paper type. PGPP has a 90-100 year life with the new pig inks > although the mattes paper have a much shorter life than with the previous > ink > set." > > Ok, my question is, how can we possibly know this with certainty?? I don't > know that I would trust wedding photos to this.....the technology just > hasn't been around long enough to know for certain. >