----- Original Message ----- From: "Otis Wright" Subject: Re: The Wilhelm testing method. Was Re: OT: Photographic Materials
> > > Can see you not into materials testing. Guess we can forgo testing > contstruction in the future. > And this has what to do with testing longevity of photographic materials? But really, do you test construction materials by seeing how it reacts to 100G? > Opinions from left field are interesting but not very constructive. Of > course if you have material performance data that refutes Wilhelms > work, it would be of some interest. Well, I do have some RC prints that have lasted far longer than Wilhelm says they would, based on his testing procedures. No yellowing, and no delamintating. The problem with his method is that it depends on extrapolating results from a presumption. This is not coming from left field, this is coming from someone who has, like Wilhelm, spent most of his life working in the technical end of photography. William Robb
