Since I didnt really get an answer in my other thread... What makes or breaks (image vs no or barely any image) a first developer for colour reversal? I read somewhere there needs to be a level of fog in the first developed image, so that the base will be clear/'clear' etc free of fog in the positive image. Well I'm having problems with a dense base/base fog in the positive image. Here is the example - very dense Is simply 'more development' the answer? Because the b&w neg after first dev looks fantastic - I have a few frames of it left, if I fix it, it'd be great, or if it further processed it into a colour neg it'd be great. My first development procedure was with Rodinal 1+50, +1.2g ascorbate, and carbonate, to put the pH up around 12 to 13. This is an improvement over previous cold process results. I've previously gotten very good looking positives free of fog/base density in the positive image using nothing but Rodinal 1+50, but at 40c and for 2 hours with agitation. There are a few reasons I believe this base fog problem to not have anything to do with Rodinal's weak colour developing properties, if you bleach and fix after Rodinal - the image is very thin, extremely difficult to see by eye almost invivislbe - its not possible for that to cancel out a full developed colour image. I've also used Xtol 1+1 at 20c, for a normal amount of time (8 to 15 min from memory) which develops a great look b&w neg which can process to form a great colour neg, but try to process that as a reversal, you'll just get basically opaque film. And I've had also great colour positives using Xtol 1+1... at 40c for long period of time however.. Any help would be great.. otherwise I might try the 1+50 @ pH 12-13 with ascorbate again, but leave it stand for an hour.