> straighten rodinal(posted 8519 days ago)While the curve shape of TMX in "standard" developers is pretty much dead straight, Rodinal 1:100 causes a mild shoulder (decreasing highlight contrast).
This can be good in that it could make highlights easier to print without extensive burning-in.
Otoh, if you want the usual TMX curve shape, the addition of a little sodium sulfite to the Rodinal working solution straightens out the shoulder, at least out to 2.25DU, the limit I ever measure. A straight curve shape could be good when working in very low-contrast lighting, using TMX for masks etc.