Digital BW, The Print

Lets set Kodak aside (I did not want to single them out in my last
post, but there seems to be decades of evidence against them).

If papers have plasticisers in the barrier there will be problems,
sure - but do they? 

Polyethene homopolymers with long chains can be quite stable in many
environments (but not all). Of course we will rarely be told what is
used, so more evidence would be helpful.  I suspect most of the RC
base we talk about comes from just a few manufacturers.

Modern (non Kodak) RC photo (silver)papers seem to last quite well
(anecdotal and personal experience).

But is there collected evidence concentrating on substrate problems
(apart from Wilhelm)?

Ken


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "john dean"
<deanwork2003@...> wrote:
>
> That is very preceptive Paul. We tend to put them all in one category
> when, fact is, we don't know what is in them.
> 
> As to Kodak, they have no credibility with me. I discussed this issue
> with the reps as recently as 5 years ago. They never cared about the
> long term. I have a friend who is a fairly well known photographer in
> the NY gallery scene. He still does type c prints that have text
> written under them so he has a lot of white paper showing inside the
> framed, matted pieces. Hell all the prints that I've seen that are
> even a few years old have yellowed in those whites. You would have
> thought 30 years would have been enought time for Kodak to figure out
> the issues.
> 
> With Premium Luster though, we probably don't know, could be better,
> I'm not counting on it. I won't tell my clients this stuff will last
> as long as rag, I just don't believe it.