Digital BW, The Print

djon43 wrote:

>--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Peter Marshall
><petermarshall@c...> wrote:
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>>Essentially affects film since the 1950s. Triacetate was used for all 
>>35mm except I think some special emulsions such as Kodak High Speed 
>>Infrared, and also for some 120 film. So basically it is all on its
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>way out.
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>Wrong, much is on Estar and similar base.
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120 and sheet film may be Estar as I said, but for 35mm everyone went 
over to triacetate in the 1950s. 
35mm Tri-X, FP4, T-Max etc all triacetate films. Only 35mm on estar base 
I ever used was the infrared.

Costs are for humidity and temperature control, not the filing sheets. 
If you really want long lifetimes, add in the inert gas!

Almost from the start I went in for archival processing.  I normally 
used hypo clear and washed films for twice the manufacturers recommended 
times and made sure I had frequent changes of water. The negs are all in 
archival filing sheets except for some early work in glassine, which I 
think is also reasonably archival. But I live in an area noted for 
humidity, which is my particular problem. Also that I'd need a larger 
house for really archival storage.

Scanning both improves storage and also gets better prints. It's enabled 
me to make A1 size prints from 35mm of a quality that I would never have 
beleived, as well as better normal-size images. So I'd recommend it to 
anyone, even if you think your negs are going to be in pristine 
condition in 20 years time.

Regards.

Peter