Heico Perma Wash for Black & White Film & Paper (1 Quart, 6-Pack)

11.36ml exactly but 11 or 11.5ml (whichever one is closest to what you can measure) would give the same result.

The manufacturer states a working solution would be 3 oz to 1 gallon.

The Heico Perma Wash should be discarded after each use.

I've used Perma Wash for longer than I can remember. To help the bottle last longer, I squeeze it a bit so there's less air inside and I screw the cap on tight. For film developing I keep my working solution stored in a tightly sealed bottle. I make enough so it fills the bottle almost to the top and thereby reduce the amount of air. Exposure to air is what shortens the shelf life -- especially when diluted. I keep a record of when I filled the bottle. And as a precaution, whether or not the solution has been used I dispose of it after about 2 weeks. I generally make 64 oz and use it for 12 rolls of 120. Keeping track of the amount of rolls is important -- so is washing between fixer and perma wash. Follow the directions on the bottle and you'll be fine. And because perma wash can leave a residue -- be sure to clean your bottles or trays before mixing a new batch. Lastly, whenever handling chemicals of any kind be sure to follow recommended safety procedures and proper disposal methods.

Although we only use perma wash in processing film you can use perma wash in your toner bath to save time. We normally wash, dry and look at our prints before toning. William