Dear Dan,(posted 8445 days ago)although I mentioned the amount of concentrate which is needed for a 135-36 the quantity will be the same for 8x10 film since the unit of square measure is near the same - 551 cm² for the 35 mm film and 516 cm² for the 8x10 film. The correct ammount would be 9,36 ml concentrate but I think to measure this might be a bit difficult.
Kind regards Wolfgang Holz