Ilford ID-78 Paper Developer

[Christopher Walrath]

Christopher Walrath submitted a new resource:

(there was a url link here which no longer exists) - Ilford ID-78 Paper Developer

Ilford's ID-78 Paper developer is a phenidone-hydroquinone developer for papers, producing warm tones on contact and enlarging papers and on lantern slide plates.

Warm Water (52C or 125F) . . . 600cc
Sodium Sulphite, dess. . . . 50g
Hydroquinone . . . 12g
Sodium Carbonate, dess. . . . 62g
Phenidone . . . 0.5g (May substitute Dimezone-S at 0.63g)
Potassium Bromide . . . 0.4g
Add water to make . . . 1 litre

This makes a stock solution. Dilute one part of the above stock...

(there was a url link here which no longer exists)

 

[Ian Grant]

POST THE CORRECT FORMULA PLEASE

This has already been listed here on Apug anyway but IT CONTAINS 4.5 gms POTASSIUM BROMIDE per litre and not 0.4 gm which was a mistake in the Photo Lab Index

 

[Christopher Walrath]

I apologize. It is too late to change. There are too many errors in the literature I have so I will refrain from sharing the info in the future. The Ilford Manual of Photography is apparently in error.

 

[Christopher Walrath]

And I ran a personal catalog of all the formulas contained herein and did not find ID78n the reason for posting it. Sorry all. My bad.

 

[Ian Grant]

Chris, yet again a lot of articles have disappeared, this formula has been posted in the relevant section twice before, once I think by Tom Hoskinson who used to use the developer himself.

The "Ilford Formulae & Packed Chemicals", published 1960 and the two Ilford Manuals of Photography that I have with it in all show the formula correctly as does LFA Mason (of Ilford) in his book Photographic Processing Chemistry.

 

[Christopher Walrath]

Correction, Wall's book.

And I did run a few googles and every other reference for this formula goes with Ian's 4.5 grams of Potassium Bromide.

 

[ahock]

Can we replenish ID-78? How much is the replenishment rate?

 

[Ian Grant]

If you replenish other paper developers then this one's no different and has a good tray life covered.

However personally I don't recommend replenishing any paper developer, I use the apprpriate amount for a printing session and use fresh dev each time.

Ian

 

[RalphLambrecht]

amen to that.everything else is a waste of time and materials.