Dektol formula?

Larry wrote:
Does anyone have a formula for Kodak Dektol. thanks once again in
advance

Larry Kriese
Larry wrote:
Does anyone have a formula for Kodak Dektol. thanks once again in
advance
_____
Larry,

Tiny correction. First amount of water should be hot at 50C. Order of
chemicals to dissolve is important.

From Photo-Lab Index 1977 issue, Page 429, Kodak D72 (approximately the
same as Dektol) stock solution:
Water at 50C 500 ml
Metol 3 g
Sodium sulphite (desic) 45 g
Hydroquinone 12 g
Sodium carbonate (mono hydr) 80 g
Potassium bromide 2 g
Water to make 1 liter

Dissolve chemicals in order given.

For paper development, dilute 1:1 or 1:2. Develop for 1 min at 20C. I
standardised my time to 2 minutes at 20C when using RC style paper.

Others may have additional info regarding this developer.

/ John

--
Regards / JCH

"jch" wrote in message
news:FCook.76142$nD.47322@pd7urf1no...
Larry wrote:
Does anyone have a formula for Kodak Dektol. thanks once
again in
advance

Larry Kriese
Larry wrote:
Does anyone have a formula for Kodak Dektol. thanks
once again in
advance
_____
Larry,

Tiny correction. First amount of water should be hot at
50C. Order of chemicals to dissolve is important.

From Photo-Lab Index 1977 issue, Page 429, Kodak D72
(approximately the
same as Dektol) stock solution:
Water at 50C 500 ml
Metol 3 g
Sodium sulphite (desic) 45 g
Hydroquinone 12 g
Sodium carbonate (mono hydr) 80 g
Potassium bromide 2 g
Water to make 1 liter

Dissolve chemicals in order given.

For paper development, dilute 1:1 or 1:2. Develop for 1
min at 20C. I
standardised my time to 2 minutes at 20C when using RC
style paper.

Others may have additional info regarding this developer.

/ John

--
Regards / JCH

Note the difference in the amount of carbonate in this
formula vs the one I posted. That is due to the hydration
specified. Older Kodak formulas usually specified anhydrous
(same as dessicated) carbonate while some later ones and
most Agfa formulae specify monohydrated. The amount of
monohydrated carbonate must be larger. Some very old British
formulae specify crystalline carbonate but I've never seen a
US or German formula that did so. Crystalline carbonate is
not very stable being deliquescent. Monohydrated is the most
stable form but anhydrous, if kept in a closed bottle, is
about as stable.
The amount of bromide specified is about the minimum to
control fog without reducing paper speed. However,
considerably more bromide, up to perhaps 12 grams per liter,
can be added to get a somewhat warmer tone or to control fog
on old paper.
In the long ago Kodak indicated dilutions of anywhere
from stock to 1:4 for various materials but more current
instructions are to use 1:2 for nearly all paper. 1:1 will
develop a bit faster and has greater capacity. RC papers
with incorporated developer will usually develop fully in
one minute but both RC paper without incorporated developer
and fiber base papers want 2 to 3 minutes. Exposure should
be based on a development time of about 2 minutes for these
papers.
Dektol/D-72 also works for film where either somewhat
high contast or very fast development is wanted but the
trade off is that its grainy. It was common in old time
newspaper offices to use the same developer for both film
and prints, typically D-72 at 1:2. There are much better
film developers but those who want grain as a special effect
should try it. Development of modern films will be very
fast.
There are many variations on D-72 but, for the most
part, they have little practical difference.


--
---
Richard Knoppow
Los Angeles, CA, USA

Richard Knoppow wrote:

It was common in old time
newspaper offices to use the same developer for both film
and prints, typically D-72 at 1:2. There are much better
film developers but those who want grain as a special effect
should try it. Development of modern films will be very
fast.

Didn't Kodak sell a Tri-Chem Pack, which was Dektol, stop bath and
fixer powders?

I have not used one in about 40 years, but I seem to vagely remember there
being different dilution for film. I may be wrong and can't find anything
by searching for it except people selling old ones and unanswered
questions.

Kodak's web page was no help. Searching for "tri chem pack" found nothing
and I was offered a suggestion to search for "try chem pack" and "tri-chem
pack" gave me nothing and a suggestion for "gedrukt pack". Don't they
have a historical list of products anywhere on their web site?


Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM

Richard Knoppow wrote (in part):

In the long ago Kodak indicated dilutions of anywhere
from stock to 1:4 for various materials but more current
instructions are to use 1:2 for nearly all paper. 1:1 will
develop a bit faster and has greater capacity. RC papers
with incorporated developer will usually develop fully in
one minute but both RC paper without incorporated developer
and fiber base papers want 2 to 3 minutes. Exposure should
be based on a development time of about 2 minutes for these
papers.

The use of more concentrated dilutions of D72 and Dektol can be understood
if you refer to Dr. Henry's tests of dilutions. He found that if you diluted
more than 1+2, the Dmax was reduced (although the lower densities were less
affected). At a dilution of 1+15 he lost an entire stop of density. This is
shown on page 92 of the second edition of his book, "Controls in Black and
White Photography." It is my guess that in the old days, photographic paper
did not reach these densities (2.4) so the fall off was less noticeable.

--
.~. Jean-David Beyer Registered Linux User 85642.
/V\ PGP-Key: 9A2FC99A Registered Machine 241939.
/( )\ Shrewsbury, New Jersey http://counter.li.org
^^-^^ 07:05:01 up 6 days, 13:11, 3 users, load average: 4.28, 4.15, 4.04

"Geoffrey S. Mendelson" wrote in message
...
Richard Knoppow wrote:

It was common in old time
newspaper offices to use the same developer for both film
and prints, typically D-72 at 1:2. There are much better
film developers but those who want grain as a special effect
should try it. Development of modern films will be very
fast.

Didn't Kodak sell a Tri-Chem Pack, which was Dektol, stop bath and
fixer powders?

I have not used one in about 40 years, but I seem to vagely remember there
being different dilution for film. I may be wrong and can't find anything
by searching for it except people selling old ones and unanswered
questions.

Kodak's web page was no help. Searching for "tri chem pack" found nothing
and I was offered a suggestion to search for "try chem pack" and "tri-chem
pack" gave me nothing and a suggestion for "gedrukt pack". Don't they
have a historical list of products anywhere on their web site?


Geoff.

I remember the TriChem packages. I don't know the time frame they were sold,
but I used them in the late 1960's-early '70's. The foil package had enough
chems for one roll of film or several prints. They were also sold in
"beginner's" kits, usually a film tank, three trays, a contact print frame,
a red light bulb, twenty five sheets of 4x5 paper and a tri-chem pack.
Thinking about how little B&W processing I do these days, if they were still
available, I'd probabl buy them!
I've processed film in Dektol, usually for newspaper work years ago. As I
recall, my time was about 1/3 that of D-76 (1:1) with a 1:2 dilution. It
worked well because the grain wasn't an issue and the newspaper wanted high
contrast.

"Geoffrey S. Mendelson" wrote in message
...
Richard Knoppow wrote:

It was common in old time
newspaper offices to use the same developer for both film
and prints, typically D-72 at 1:2. There are much better
film developers but those who want grain as a special
effect
should try it. Development of modern films will be very
fast.

Didn't Kodak sell a Tri-Chem Pack, which was Dektol, stop
bath and
fixer powders?

I have not used one in about 40 years, but I seem to
vagely remember there
being different dilution for film. I may be wrong and
can't find anything
by searching for it except people selling old ones and
unanswered
questions.

Kodak's web page was no help. Searching for "tri chem
pack" found nothing
and I was offered a suggestion to search for "try chem
pack" and "tri-chem
pack" gave me nothing and a suggestion for "gedrukt pack".
Don't they
have a historical list of products anywhere on their web
site?


Geoff.

--
Geoffrey S. Mendelson, Jerusalem, Israel
N3OWJ/4X1GM

The developer in the Tri-Chem-Pack was something Kodak
called Versatol. It was not quite Dektol but something a bit
milder that was suitable for both film and paper. I don't
think there was a formula for anything quite like it. I
think I used a Tri-Chem-Pack for the very first film I
developed. My dad bought a Kodak darkroom in a box which had
some Tri-Chem-Packs, a small package of Velox, three small
trays, a ruby lamp, a couple of film clips and some other
stuff. I can see the film coming up in my mind to this day.
Kodak has a list of cameras and, at one time, a list of
discontined roll film sizes, but I don't remember seeing a
list of products. In any case, the company appears to have
lost any sense of its own history at this point and has
scattered whatever documents it had to various oranizations,
mostly GEH and RIT.


--
---
Richard Knoppow
Los Angeles, CA, USA

"Ken Hart1" wrote in message
news:3PDok.787$_H1.627@trnddc05...

"Geoffrey S. Mendelson" wrote in
message ...
Richard Knoppow wrote:

It was common in old time
newspaper offices to use the same developer for both
film
and prints, typically D-72 at 1:2. There are much better
film developers but those who want grain as a special
effect
should try it. Development of modern films will be very
fast.

Didn't Kodak sell a Tri-Chem Pack, which was Dektol, stop
bath and
fixer powders?

I have not used one in about 40 years, but I seem to
vagely remember there
being different dilution for film. I may be wrong and
can't find anything
by searching for it except people selling old ones and
unanswered
questions.

Kodak's web page was no help. Searching for "tri chem
pack" found nothing
and I was offered a suggestion to search for "try chem
pack" and "tri-chem
pack" gave me nothing and a suggestion for "gedrukt
pack". Don't they
have a historical list of products anywhere on their web
site?


Geoff.

I remember the TriChem packages. I don't know the time
frame they were sold, but I used them in the late
1960's-early '70's. The foil package had enough chems for
one roll of film or several prints. They were also sold in
"beginner's" kits, usually a film tank, three trays, a
contact print frame, a red light bulb, twenty five sheets
of 4x5 paper and a tri-chem pack.
Thinking about how little B&W processing I do these days,
if they were still available, I'd probabl buy them!
I've processed film in Dektol, usually for newspaper work
years ago. As I recall, my time was about 1/3 that of D-76
(1:1) with a 1:2 dilution. It worked well because the
grain wasn't an issue and the newspaper wanted high
contrast.

I'm not sure of the date of the Tri-Chem-Pak but I used
them in the late 1940's or early 1950's. There was a
predecessor but I don't remember what it was called. I think
the earlier version may have used D-72 as the universal
developer. I will have to do some research on this.


--
---
Richard Knoppow
Los Angeles, CA, USA

"Richard Knoppow" wrote

I think the earlier version may have used D-72 as the universal developer.
I will have to do some research on this.

The Kodak ABC Photo Lab came with 'Universal MQ Developer'.
The earlier ones came with the developer in tablets, they
were packaged in a tube like cough lozenges. Later ones
came with the developer in a foil package stapled inside a
cardboard cover, like an oversize pack of matches. The fixer
was in a can, though I have vague memories of a small paper
pack of fix.

I used Tri-Chem packs c. 1960. For some reason it has stuck
in my head the developer was Dektol and labeled as such.

"Versatol" was, I believe, a liquid.

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index2.htm
n o lindan at ix dot netcom dot com

"Nicholas O. Lindan" wrote in message
m...
"Richard Knoppow" wrote

I think the earlier version may have used D-72 as the
universal developer. I will have to do some research on
this.

The Kodak ABC Photo Lab came with 'Universal MQ
Developer'.
The earlier ones came with the developer in tablets, they
were packaged in a tube like cough lozenges. Later ones
came with the developer in a foil package stapled inside a
cardboard cover, like an oversize pack of matches. The
fixer
was in a can, though I have vague memories of a small
paper
pack of fix.

I used Tri-Chem packs c. 1960. For some reason it has
stuck
in my head the developer was Dektol and labeled as such.

"Versatol" was, I believe, a liquid.

--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index2.htm
n o lindan at ix dot netcom dot com
I think you are right about the Versatol. The stuff I
used was in the small foil packets packed in a cardboard
wrapper like paper matches. I don't go back quite far enough
for the tablet developers but they appear to have been
popular in the 1930s and 1940s, perhaps even earlier.
Tabloid was one brand name.


--
---
Richard Knoppow
Los Angeles, CA, USA

"Richard Knoppow" wrote in message
m...
snip
I think you are right about the Versatol. The stuff I used was in the
small foil packets packed in a cardboard wrapper like paper matches. I
don't go back quite far enough for the tablet developers but they appear
to have been popular in the 1930s and 1940s, perhaps even earlier. Tabloid
was one brand name.



I have a Kodak Autographic with instruction book. In the back of the book
are various darkroom items, among them a picture of the tablet type
developer. It looks sort of like a roll of LifeSavers.