Originally Posted by Simon R Galley
Your 'good authority' has ' very bad information'
I will save you a calculation or two....
( Excluding waste etc ) you get 17.58 rolls of 135 - 36 per m2 of parent roll, 26.37 rolls for 24 exp and 19.55 rolls of 120 film per m2.
Simon ILFORD photo / HARMAN technology Limited :
Wait, what? I said 1600 sqft per mole of metallic silver.