Sodium Sulfite

[Gary Holliday]

I just purchased some Sodium Sulfite raw chemical. I'm reading some conflicting information on it's quantity for use as a wash aid?

How much per 1000ml? 1 teaspoon or one tablespoon?

How many minutes (approx) is required for fibre based paper after Ilford Rapid Fix for example.

How much washing after its use?

Thanks

 

[Ian Grant]

1-2% solution, it's not really critical, so a teaspoon will be fine. I usually soak for about 5 minutes.

Ian

 

[Gary Holliday]

Cheers, normal water temperature for dissolving the powder?

 

[Ian Grant]

Tap water's ok as long as it's not too cold. Thinking about it a couple of teaspoons of Sodium Sulphite would be better per litre.

Ian

 

[fschifano]

Room temperature, ~68 - 75 F., water is fine. Two tespoons in a litre will dissolve quickly. I do it all the time.

 

[patricia de roeck]

Gary, I've been using the sod.sulphite at 1 teaspoon per litre of water and dissolve it first in about 100 ml of very warm to hot water - then keep filling to 1 litre with the cold tap - this makes sure the powder is properly disssolved and brings the total litre up to about 20 deg. C solution - started doing this after finding bits of undisolved powder in the tray even after an hour.
I soak the prints in it for 10 mins, agitating now and then - does the job and is cheap as chips.
Patricia.

 

[patricia de roeck]

Whoops - forgot the rest of your questions - yes, this is for fibre paper and after using Rapid Fix I wash in running water for 5 mins, wash aid for 10 mins then final wash in running water for 20 mins.
Patricia

 

[Fanshaw]

I just purchased some Sodium Sulfite raw chemical.



Thanks

If you have found a good source for this in the UK, perhaps you could share the information?

 

[Gary Holliday]

Silverprint and Retrophotographic in the UK.

http://www.silverprint.co.uk/ (chemicals/raw chemicals)

Dead Link Removed