Alkaline Fixers (Tim Rudman)

These two formulæ are from Tim Rudman’s ‘The Master Photographer’s Lith Printing Course‘, a book well worth investing in if you have any interest in the lith process. Although prices have gone rather silly for this out-of-print volume, it is still possible to get secondhand copies at not too extortionate prices.

Alkaline Fixer 1

Water...........................750 ml
Sodium Thiosulfate...............60 g
Sodium Carbonate..................5 g
Water to make..................1000 ml

Alkaline Fixer 2

Water...........................750 ml
Sodium Thiosulfate..............100 g
Sodium Chloride (common salt)...a handful!
Water to make..................1000 ml

The amount of sodium thiosulfate in ‘normal’ fixer is around 250-300 g., so these are much more dilute and take correspondingly longer to fix prints. I have not done tests to ascertain times as yet.
If you try them, watch the colour of the lith print as it fixes and see if it changes over time.

 

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