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Re: [OM] film longevity

Subject: Re: [OM] film longevity
From: "Giles" <cnocbui@xxxxxxxxx>
Date: Tue, 21 Mar 2000 18:28:41 +0000
>From a previous post:

>>>>>
From:             "C.H.Ling" <chling@xxxxxxxxxxxxxx>
To:               <olympus@xxxxxxxxxxxxxxx>
Subject:          Re: [OM] Other Problems with FILM
Date sent:        Fri, 10 Jul 1998 21:54:28 +0800
Send reply to:    olympus@xxxxxxxxxxxxxxx

----------
> From: Kerry Dressler <bio-photo@xxxxxxxxxxxxx>
> To: olympus@xxxxxxxxxxxxxxx
> Subject: [OM] Other Problems with FILM
> Date: Friday, July 10, 1998 10:17 AM
> 
............
> 
> I use Kodak Kodachrome 64 for 900f my work.  Reasons? Well, all the E-6
> films have to be developed correctly by conscientious labs to have even a
> chance at longetivity.  
........
> I've got Kodachrome shot 25 years ago, never ke
> looks like it was shot yesterday.  I haven't seen Agfa, Fuji, Ektachrome,
> or anything else that has lasted the test of time.
........

I have some interesting information on the dark and light fading of slide
films, information is from a 1990 popular photography, by Henry Wilhelm:

Light Fading
----------------------------------------------------------
Data are actual results based on      Projection time to  
intermittent projection of the        reach objectionable
test films listed.                    loss of dye density 
                                      or color shift
----------------------------------------------------------
Fujichrome Amateur and Pro films      5 hrs 20 min
----------------------------------------------------------
3M Scotch Chrome 100,400,800/3200     3 hrs 30 min
----------------------------------------------------------
Fuji Velvia Pro                       3 hrs 20 min
----------------------------------------------------------
Kodak Ektachrom films                 2 hrs 40 min
----------------------------------------------------------
Agfachrome Pro 50RS 100RS, 100CT..    2 hrs
----------------------------------------------------------
Kodachrome Amateur and Pro.           1 hr
----------------------------------------------------------

Dark Fading
---------------------------------------------------------
Based on accelerated aging          Days for 200ss 
test (144 deg.F 45%RH)              least stable image dye
----------------------------------------------------------
Kodachrome Amateur and Pro.           580
----------------------------------------------------------
Kodak Ektachrome                      210-225
----------------------------------------------------------
Fuji Velvia Pro                       185
----------------------------------------------------------
Fujichrome Amateur and Pro.           185
----------------------------------------------------------
Agfachrome 50RS,100RS/CT,200RS/CT     140
----------------------------------------------------------
3M Scotch Chrome                       95
----------------------------------------------------------
Agfachrome 1000RS Pro                  75
----------------------------------------------------------
3M Scotch Chrome 1000                  45
Polaroid Presentation Chrome 
----------------------------------------------------------


C.H.Ling
...............................
Accura Digital Imaging
http://www.glink.net.hk/~chling
<<<<

Giles

John A. Lind wrote:

> There is a site with actual longevity data from controlled accelerated life
> testing, but I couldn't find the URL for it.   :-(   (Might be on
> Greenspun's Photo.net somewhere.)
> 

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