What's CD-4? C-41 Split Developer

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Alan Smithee - 18 May 2005 20:32 GMT

A while back someone (F. Miniter) publish the Dignan NCF-41 split developer
recipe for developing color negative film without having to worry too much
about temperature. What exactly is CD-4 in line three of bath A? Is there
any update to this formula or better methods? Does anyone use this process
regularly? Thx.

[Snipped]
He gives the Dignan NCF-41 Formula as follows:

A Bath

Water (distilled): 300 ml
Sodium Bisulfite : 0.5 g.
CD-4 : 5.5 g.
Sodium Sulfite : 4.5 g.
Water (distilled) to make 500 ml.

pH @[EMAIL PROTECTED]
75° : up to 6.5

B Bath

Water (distilled) 500: ml
Potassium Carbonate : 53 g.
Potassium Bromide : 0.5 g.
Benzotriazole (Kodak Anti-Fog #2) : 2 mg. (not used in tests described in
text)
Water (distilled) to make : 1 liter

pH @[EMAIL PROTECTED]
75° : 11.8

Developing temperature : 75°

3:00 min in A Bath with continuous or intermittent agitation
5:45 min in B Bath with agitation of your choice
Stop Bath
Blix (note at 75°, it will take longer to do its job than at 100°)

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Nick Zentena - 18 May 2005 21:37 GMT

> A while back someone (F. Miniter) publish the Dignan NCF-41 split developer
> recipe for developing color negative film without having to worry too much
> about temperature. What exactly is CD-4 in line three of bath A? Is there

Colour Developer #4. CD-4. At least that's my understanding. CD-4 is used
for film. CD-3 for RA-4. Your chemical seller will likely be able to supply
it.

Nick

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Francis A. Miniter - 19 May 2005 03:55 GMT

>>A while back someone (F. Miniter) publish the Dignan NCF-41 split developer
>>recipe for developing color negative film without having to worry too much
[quoted text clipped - 5 lines]
>
> Nick

That is correct. Do not confuse with CD-3 which can be used for RA-4 color
printing formulas, but not for film processing. Kodak invented all of the CD-X
series of color formulas. Most photochemical suppliers will carry these
chemicals. A couple of years ago, someone posted the proper chemical names of
each of these formulations. A google search will show them.

Francis A. Miniter

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Bernie - 21 May 2005 02:31 GMT

Francis is correct. In fact, check kodak.com for the MSDS sheet for
Flexicolor developer Replenisher (C-41) and you will see the full chemical
name for CD-4. After trying to pronounce all those syllables, you will
quickly understand why Kodak ended up classifying each with just a letter
(CD means Color Developing Agent) and a number to make them easy to refer
to.

A couple of years ago, someone posted the proper chemical names of each
of these formulations. A google search will show them.

> Francis A. Miniter

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Alan Smithee - 19 May 2005 05:34 GMT

>> A while back someone (F. Miniter) publish the Dignan NCF-41 split
>> developer recipe for developing color negative film without having
[quoted text clipped - 6 lines]
>
> Nick

Thx. Folks.

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