I’ve just purchased the Legacy Pro Sepia toner. For those who have used it, do you mix it as you go, or mix up a 1 quart working solution and re-use it?
If it is a powder, you cannot reliably mix portions of the powder, because there is no accurate way of ensuring consistent distribution of the component parts.
In my case, with similar materials, I mix up the whole amount and then, wrt the bleach part, dilute a portion of the stock solution liquid to make a working strength portion.