Better make it thirty minutes, not twenty, or you'll get negatives that lack "snap". I have tried it -- it's got some Rodinal qualities, by way of making no apology for grain (which, with Tri-X, is left hard and gritty), but also produces excellent sharpness and fine tones. It's hard to imagine a cheaper developer; $5 worth of coffee and $2 worth of soda will developer at least 100 rolls of film.Originally Posted by fhovie
BTW, different brands of instant coffee may require adjustment of the amount used; the above works well with Folger's Coffee Crystals, but other brands have required up to twice as much coffee.
VERY IMPORTANT: mix in the soda first, so you can see when the solution is completely clear, then add the coffee and mix until the solution is an even dark brown with all the "creamy" quality gone; this will reduce or eliminate micro-bubbles of air introduced with the powered ingredients. Even then, I see some unevenness in the general stain and tiny spots from time to time that I presume are hints I'm not mixing the coffee well enough. Next time I use this, I might try filtering it through (what else?) a coffee filter before putting it in the tank.