OmegaB600
Member
Ilfotec HC
The directions have you make that intermediary stock solution that you then dilute into the final working solution for your tank. Far too many people just take it straight out of the bottle, and skip the intermediary solution. The problem is...
the numbers dont add up.
For some reason the stock solution is 1 part HC +3 parts water.. ie my 200 ml glass bottle needs 50 ml HC and 150 ml water..
That gets diluted into the solutions.. so when dilution X requires 50ml of this stock solution to 950ml water...
How is that supposed to be equaled by using 50ml of pure HC from the bottle?
The directions have you make that intermediary stock solution that you then dilute into the final working solution for your tank. Far too many people just take it straight out of the bottle, and skip the intermediary solution. The problem is...
the numbers dont add up.
For some reason the stock solution is 1 part HC +3 parts water.. ie my 200 ml glass bottle needs 50 ml HC and 150 ml water..
That gets diluted into the solutions.. so when dilution X requires 50ml of this stock solution to 950ml water...
How is that supposed to be equaled by using 50ml of pure HC from the bottle?
Freakscene
Obscure member
50ml of stock + 150ml of water is not the same as 50ml of concentrate + 150ml of water, but to my knowledge no-one says they are.
Ilford says “It is very difficult to measure accurately small quantities of Ilfotec HC concentrate. For this reason, we recommend that the whole bottle of concentrate is diluted to form a stock solution, which is diluted later for use.”
But the stock has a very short storage life, and it is is not that hard to measure Ilfotec-HC or Kodak HC-110 using a syringe. There is a photo of doing so with a bottle stopper syringe and a plain syringe here: Kodak HC-110 Developer - Unofficial Resource Page
So, once you put the measurement issue aside, for example, Ilfotec 1+31 made from 1 part stock (1+3) and 7 parts water, is exactly the same as 1 part concentrate + 31 parts water.
I made the attached table for HC-110 and different size tanks. Never had a problem, including using two baths at 1+50 and 1+200.
Marty
Ilford says “It is very difficult to measure accurately small quantities of Ilfotec HC concentrate. For this reason, we recommend that the whole bottle of concentrate is diluted to form a stock solution, which is diluted later for use.”
But the stock has a very short storage life, and it is is not that hard to measure Ilfotec-HC or Kodak HC-110 using a syringe. There is a photo of doing so with a bottle stopper syringe and a plain syringe here: Kodak HC-110 Developer - Unofficial Resource Page
So, once you put the measurement issue aside, for example, Ilfotec 1+31 made from 1 part stock (1+3) and 7 parts water, is exactly the same as 1 part concentrate + 31 parts water.
I made the attached table for HC-110 and different size tanks. Never had a problem, including using two baths at 1+50 and 1+200.
Marty
