[net.movies] film stock fading

sasaki@harvard.UUCP (Marty Sasaki) (05/15/84)

-
All film stock fades. Even with modern chemistry film
fades. Even if you store it in darkness at the proper
temperature and humidity it fades. Archivists are very
concerned about this and companies like Kodak are working
on the problem, but if you want film to last, then it has
to be in black and white.

Wait, I take that last statement back. Magnetic storing
and digital storage in general will last as well.

		-Marty Sasaki

upstill@ucbvax.UUCP (Steve Upstill) (05/16/84)

    Indeed, all color film fades.  But many old color movies (particularly
Disney flicks) still have perfect color.  Why?  Because they were done
originally in three-strip Technicolor or stored in separation: in either
case, the three colors from each frame are maintained in black-and-white.

ron@brl-vgr.ARPA (Ron Natalie <ron>) (05/16/84)

That's so whole point of the Technicolor separations.  Storing as
three black and white separations means prints made today are just
as (if not more) vivid than prints made at the release time of the
movie.

-Ron

stan@clyde.UUCP (Stan King) (05/17/84)

>  All film stock fades. Even with modern chemistry film
>  fades. Even if you store it in darkness at the proper
>  temperature and humidity it fades. Archivists are very
>  concerned about this and companies like Kodak are working
>  on the problem, but if you want film to last, then it has
>  to be in black and white.
>  
>  Wait, I take that last statement back. Magnetic storing
>  and digital storage in general will last as well.
>  
>  		-Marty Sasaki

Has anybody here ever tried to read a ten-year old magnetic digital
tape?  20-year old?  Seems like color film compares pretty well to that.

rsu@cbscc.UUCP (Rick Urban) (05/17/84)

	True, black-and-white film stock will not deteriorate at nearly as
fast a rate as color film, but eventually, b&w film stock will also "fade".

davew@shark.UUCP (Dave Williams) (05/18/84)

 Several years ago I saw a clip of the first Technicolor film
done in circa 1930 with Eddie Cantor. It was just as good
as any 35mm film done today. The colors were bright and vivid
and the whites were just slightly toward blue. The original
Technicolor process used a 35mm Mitchell camera with 3 film
gates, side by side, and a prism to seperate the received
image into three paths. A color filter was used in each
optical path to seperate the images into the primary
colors. Because of the optics and filtering greater light
and more consistant color temperature had to be used.
Prints were made using the three negatives using a step
printing technique and dye transfer. The negatives were
standard b&w stock.
                                Dave Williams
                                Tektronix, Inc.
                                ECS

jrb@wdl1.UUCP (jrb ) (05/21/84)

#R:harvard:-24800:wdl1:1500002:000:312
wdl1!jrb    May 17 11:24:00 1984

The answer is to do a dye-transfer 3-colour separation (as was done for
The Empire Strikes Back).  The problem is that is expensive and there is
only one place in the world that does them (and it's in China).

					John R Blaker
					UUCP:	...!fortune!wdl1!jrb
					ARPA:	jrb@FORD-WDL1
					   	blaker@FORD-WDL2

jrb@wdl1.UUCP (jrb ) (05/21/84)

#R:harvard:-24800:wdl1:1500003:000:178
wdl1!jrb    May 17 15:10:00 1984

Except that most films no longer use Technicolour because it is too expensive.

				John R Blaker
				UUCP:	...!fortune!wdl1!jrb
				ARPA:	jrb@FORD-WDL1
				and	blaker@FORD-WDL2