Hello! Just built up my darkroom, just a few things missing, for example the paper developer. I have a couple of hundreds of Agfa MCP RC paper sheets, so I'll be using them for some time. If I understand, then it's harder to get cold tone for chloro-bromide papers. And I don't feel like making soft warm-tone pictures. So what interests me is - 1) how to get my Agfa MCP RC cold tones. I think I could mix the developer myself, but the only supplier chemical substances has run out of hydroquinone, and there are not too many photoshops around here. and 2) I've searched for the chemical ingredients for different paper developers, and what seemes strange to me is that there are 2 very similar developers, and the ratios of the chemical substances are very similar, but one of them is called a warm tone dev., but the other - cold tone. Here they are: the warm tone - (GAF-125) Water (125°F/52°C) 750 ml Metol 3 g Sodium Sulfite (anhy) 44 g Hydroquinone 12 g Sodium Carbonate (anhy) 65 g Potassium Bromide 2 g Cold water to make 1000 ml and the cold tone - Burki and Jenny Water (110°F/43°C) 750 ml Metol 3 g Sodium sulfite 40 g Hydroquinone 12 g Sodium carbonate (mono)* 75 g Potassium bromide 0.8 g Water to make 1000 ml Only the Potassium Bromide and Sodium Carbonate ratio changes noticeably. So which elements change the tonality? Thanks.