Ilford ID-1 Film Developer

[Christopher Walrath]

Christopher Walrath submitted a new resource:

(there was a url link here which no longer exists) - Ilford ID-1 Film Developer

ILFORD FILM DEVELOPER ID-1

An obsolete pyro-soda type developer for tray developing of slower films. This contains two stock solution recipes that are combined for a working solution. The stock solutions have good shelf life, but a short pot life when combined. Faster films may have increased grain, but given the composition of modern films, this is not likely. This developer may cause some slight brown staining on the negatives.

STOCK SOLUTION A

WATER(52C...

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

 

[Trask]

Why would tray and tank development have such different proportions of stock A to stock B to water? One would almost think that the tank formula would have less stock B (accelerator) than stock A for trays. Just curious and I like to learn...

 

[Ian Grant]

Traditionally tray development requires shorter processing times, this is for convenience and also to minimise the risk of aerial fogging, and uneven staining. So this is why it's used with more alkali & bromide and slightly more concentrated.

People using Pyrocat today un trays often use the 2+2+100 dilution rather tahn the 1+1+100 for similar reasons.

The Metabisulphite needs to be added first to prevent oxidation of the Pyrogallol which decomposes rapidly in water without it. It's important to use reasonably fresh Metabisulphite as this increases the potential shlf life of Part A.

The Ilford published formula uses 37.5g Sodium Carbonate (anhydrous)

Ian

 

[Christopher Walrath]

Thank you, Ian.