History of C41 Process?

What year did C41 processing first come into wide commercial usage?

"Joseph Kewfi" wrote in
:

What year did C41 processing first come into wide commercial usage?


1941. DUH!!





;-)


- Al.

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Joseph Kewfi wrote:
What year did C41 processing first come into wide commercial usage?

I believe it was after 1969 and I also found this

1980 Ilford develop the first chromogenic film. XP1 was a black & white film
with colour dye technology so it could be processed in conventional C-41
colour chemistry.


--
Joseph Meehan

Dia's Muire duit

Joseph Kewfi wrote:
What year did C41 processing first come into wide commercial usage?

I'm pretty sure it was in 1972 at the same time that the
110 cartridge was introduced. I believe that c-41 Kodacolor II
film was only available in 110 format at first, so as to
give the new format an initial advantage.

So 1973 would be the time you could first get it for a
35mm camera. Process c-22 died slowly in the mid 1970s.
When minilabs started springing up in 1977, they were
c-41 only. I think it was still possible to find c-22
films until sometime in the 1980s.

Peter.
--

Joseph Kewfi wrote:
What year did C41 processing first come into wide commercial usage?

I'm pretty sure it was in 1972 at the same time that the
110 cartridge was introduced. I believe that c-41 Kodacolor II
film was only available in 110 format at first, so as to
give the new format an initial advantage.

So 1973 would be the time you could first get it for a
35mm camera. Process c-22 died slowly in the mid 1970s.
When minilabs started springing up in 1977, they were
c-41 only. I think it was still possible to find c-22
films until sometime in the 1980s.

Peter.
--

Thanks alot, this is useful, you wouldn't happen to know where I might find
longevity projections for C22 & C41 films by any chance?
Reason I ask is, I just stumbled upon a large archive of old family colour
negs, the last processed in 1985 and still clear as day.

"Peter Irwin" wrote in message
...
Joseph Kewfi wrote:
What year did C41 processing first come into wide commercial usage?

I'm pretty sure it was in 1972 at the same time that the
110 cartridge was introduced. I believe that c-41 Kodacolor II
film was only available in 110 format at first, so as to
give the new format an initial advantage.

So 1973 would be the time you could first get it for a
35mm camera. Process c-22 died slowly in the mid 1970s.
When minilabs started springing up in 1977, they were
c-41 only. I think it was still possible to find c-22
films until sometime in the 1980s.

Peter.
--

Joseph Kewfi wrote:
Thanks alot, this is useful, you wouldn't happen to know where I might find
longevity projections for C22 & C41 films by any chance?
Reason I ask is, I just stumbled upon a large archive of old family colour
negs, the last processed in 1985 and still clear as day.


I haven't seen any figures of the sort which you are asking for.
There is a table in the 8th edition of the Manual of Photography
(focal press) showing the increase in longevity of the dyes used
in Kodak colour prints from 1941 to 1971 which shows dye life improving
by a factor of two every five years or so.

Temperature and humidity are very important factors in how long
the dyes used in colour materials will last. It also seems that
differences in processing can be important. Many of our family
photographs (prints and negatives) from the 1970s have been stored
under identical circumstances, but some still appear good and others
hopelessly bad. I understand that cyan dyes can be attacked by
residual thiosulphate ions, so differences in processing
is not an unlikely cause of different survival rates.

Fortunately the greater number of our family photos from that era
were either black and white or Kodachrome, both of which have lasted
just fine. When I get a scanner, I will take a look at the colour
negatives again. We only have a few rolls of colour negs from the
late 1960s, they looked ok to me, but I will know more when I try
to scan them.

There doesn't seem to be any hard rule that says that old colour
negatives can't be good after thirty or forty years, even if
a lot of the films from the 1970s have deteriorated very badly.

Peter.
--

Joseph Kewfi wrote:
Thanks alot, this is useful, you wouldn't happen to know where I might find
longevity projections for C22 & C41 films by any chance?
Reason I ask is, I just stumbled upon a large archive of old family colour
negs, the last processed in 1985 and still clear as day.


I haven't seen any figures of the sort which you are asking for.
There is a table in the 8th edition of the Manual of Photography
(focal press) showing the increase in longevity of the dyes used
in Kodak colour prints from 1941 to 1971 which shows dye life improving
by a factor of two every five years or so.

Temperature and humidity are very important factors in how long
the dyes used in colour materials will last. It also seems that
differences in processing can be important. Many of our family
photographs (prints and negatives) from the 1970s have been stored
under identical circumstances, but some still appear good and others
hopelessly bad. I understand that cyan dyes can be attacked by
residual thiosulphate ions, so differences in processing
is not an unlikely cause of different survival rates.

Fortunately the greater number of our family photos from that era
were either black and white or Kodachrome, both of which have lasted
just fine. When I get a scanner, I will take a look at the colour
negatives again. We only have a few rolls of colour negs from the
late 1960s, they looked ok to me, but I will know more when I try
to scan them.

There doesn't seem to be any hard rule that says that old colour
negatives can't be good after thirty or forty years, even if
a lot of the films from the 1970s have deteriorated very badly.

Peter.
--

"Joseph Kewfi" writes:

Thanks alot, this is useful, you wouldn't happen to know where I
might find longevity projections for C22 & C41 films by any chance?
Reason I ask is, I just stumbled upon a large archive of old family
colour negs, the last processed in 1985 and still clear as day.

The main book on the top, _The Permanence and Care of Color
Photographs: Traditional and Digital Color Prints, Color Negatives,
Slides, and Motion Pictures_ by Henry Wilhelm and Carol Brower, is
actually available for download from the Wilhelm Research web site,
see http://www.wilhelm-research.com/book_toc.html.
--
David Dyer-Bennet, , http://www.dd-b.net/dd-b/
RKBA: http://noguns-nomoney.com/ http://www.dd-b.net/carry/
Pics: http://dd-b.lighthunters.net/ http://www.dd-b.net/dd-b/SnapshotAlbum/
Dragaera/Steven Brust: http://dragaera.info/

"Joseph Kewfi" writes:

Thanks alot, this is useful, you wouldn't happen to know where I
might find longevity projections for C22 & C41 films by any chance?
Reason I ask is, I just stumbled upon a large archive of old family
colour negs, the last processed in 1985 and still clear as day.

The main book on the top, _The Permanence and Care of Color
Photographs: Traditional and Digital Color Prints, Color Negatives,
Slides, and Motion Pictures_ by Henry Wilhelm and Carol Brower, is
actually available for download from the Wilhelm Research web site,
see http://www.wilhelm-research.com/book_toc.html.
--
David Dyer-Bennet, , http://www.dd-b.net/dd-b/
RKBA: http://noguns-nomoney.com/ http://www.dd-b.net/carry/
Pics: http://dd-b.lighthunters.net/ http://www.dd-b.net/dd-b/SnapshotAlbum/
Dragaera/Steven Brust: http://dragaera.info/