Working my way through home mixed lith formulas, from the web and Tim Rudman's books, I mixed up this mix TWICE yesterday.
In both mixes after about 10 minutes the developer started to darken very quickly to an almost opaque brown. It did remain usable for about 20 mins though, BUT it DID NOT produce anything lith like on some new Fomatone Classic FB paper, that says that it is lithable in the accompanying information sheet. The actual prints made just looked like ordinary FB prints, but with the toned paper base.
I'm quite new to lith, but comparing the level of sodium sulphite to other formulas, it does seem REALLY low to me?
Terry S