No, this isn't a joke, and it's too late for April Fool's Day (I did love the post about Kodak making Panatomic-X available in ULF, though). A friend of mine has a bunch of AGFA Portriga paper which was quite old, and apparently heat damaged. He asked me what he could do, and I suggested adding some sodium- or potassium bromide to the paper developer (Dektol, diluted 1:3). He had neither of those chemicals, but he did have some potassium ferracyananide, of which he added a pinch, to 2 litres of developer. The results aren't perfect, but they're not bad; the blacks are a bit weak, and the contrast low, even on grade 3 Portriga, but the whites are clean. I suggested that he try diluting the developer 1:1 or 1:2 to restore the blacks, and try a half-pinch (only in a pinch, of course!), instead of a full pinch, of the potassium ferracyananide. I have never heard of adding potassium ferracyananide to developer; has anybody ever done this, or have any knowledge of it? Could somebody explain why this seems to work?