Yep. That can be controlled with a little real Listerine (thymol) in the blend. But don't know if mint
flavor will make a neg print different than regular flavor! Or you can filter the water thru a coffee
filter and risk lint from that getting into the water. Just so much easier to mix up fresh each session
and not worry about all this other stuff.
Gosh, Vaughn ... I thought that up thar in the woods folks would be fermenting it for microbrew.
It takes me at least a decade to use up a bottle of Photoflow. It doesn't take more than a few drops
at a time. And kept too long it will breed Saprolegnia (water mold, just in case you want some of
that authentic aged taste in the hooch, Vaughn ... prints some labels like "Saprolegnia Silver" and
some place like Beverages & More could probably sell it.
The university darkroom (125 students/semester) has been working off the same bottle of Photo-flo here for well over a decade. But it is a gallon bottle...and is the Photo-flo 2100. Yes, mixed 1:2100 for use.
I take 7 oz of it and mix it to make a gallon of stock solution. The stock solution is then mixed at 1 oz per gallon for use. I doubt I will get thru the original gallon of 2100 before I retire.
At least with LF landscape, a bad day of photography can still be a good day of exercise.
Has anyone tried using other sources of surfactants for film drying? I know dish detergent is frowned on, but they sell industrial wetting agents at gardening centres for getting water into high-silicate soils. Anyone tried that?
For those of us without access to a lifetime supply of Photoflo-2100, it might become an interesting question soon. My previous bottle of Photoflo-200 was $3.99 (2009) and I've got 25% left. Concerned at Kodak going bust, I bought a new bottle last month: $12.99. I don't reckon I'll be able to buy any more at any price in Australia as the shops say it's discontinued and I got the last bottle from my local store.
Kodak chemicals aren't made by Kodak anymore, so at best it's a marketing issue. Photoflo and Ilfotol
seem identical anyway, or you could batch your own. I'd never dream of using a gardening product;
it would be hard to know exactly what else is in it, even if you read the MSDS, which only needs to
list hazardous ingredients which are non-trade-secret. The unavailablility of certain things in Australia seems to be totally unrelated to Kodak mfg itself - I've heard the same thing about HC110
I'm with Dan....I add about 4-5 drops per liter (much less than 1:1000) and a splash (a tablespoon maybe) of isopropyl alcohol. I went with a lower amount of photoflo because it tended to leave marks on my film in my water (Lake Michigan). Photoflo and alcohol act in different ways to change the surface tension. There are other surfactants like SDS or igepal but I figure that Kodak had smart chemists so I'll go with photoflo.
I reuse it until I've run enough rolls through it that it starts going pink. Though I can't imagine the alcohol in it at the 1:200 dilution not preventing mold growth. Though aren't you're only going to get mold if you have contamination to begin with.....