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You’re basically done but the stuff needs 72 hours (3 whole days) to react out entirely – an excessive but useful safety margin. The undissolved pill coating may float at the top/change colour/look funky, don’t worry about it. Mix the contents of the bottle from time to time, help that stuff mix and react why won’t you.
After 3 days transfer to smaller container/squeeze out extra air from container/throw in glass marbles like a mid XX century chemist weirdo/in general avoid exposing your chems to air. Or light. Did I mention having the container light-tight? Well, it should. I used a transluscent one to visually monitor the contents.
Use like normal Rodinal, same dilutions. Mix/shake before use, the stuff’s got some precipitate in it.
My third world Polish ingredients added up to a whopping 1.31 EUR/ 1.48 USD for the 250ml bottle of the stuff, again, for approx 30 rolls of 35mm film. 1/5th of the cheapest store-bought generic Rodinal.