I know about Wilhelm, and it's the marketing people who are hyping print longevity. When I see a 50+ year old ink jet print that hasn't faded, I'll believe that they have reasonable longevity. Over the years many scientists, engineers, designers, and manufacturers have made innumerable claims, all based on then current knowledge and information, and many of those claims have been proven wrong.
Mike Johnston wrote: > Don't mean to pick on you here, Shel my friend, it's not quite that > unknowable. Henry Wilhelm runs an independent lab and had been working with > print permanence for many decades (he was part of the original "East Street > Gallery" that first devised archival washers for black-and-white). His > integrity is unquestioned, and his methods for determining likely print LE > (life expectancy) are by now very sophisticated. He did get blindsided by > the ozone "orange fade" problem last year, but generally his methods are a > pretty good indicator of likely print LE. After all, it's widely accepted > that the permanence of a good platinum print is 200-500 years, but > photography hasn't been around that long. These claims, while not 100% > certain (what is?) are not just based on marketing. -- Shel Belinkoff mailto:[EMAIL PROTECTED] http://home.earthlink.net/~belinkoff/pow/enter_pow.html - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
