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@mielonyzmajonezem "Green stains are not mould, as is often wrongly assumed, but are due to chlorophyll, the substance that give plants their colour. If the tobacco is dried at too high a temperature and too low a humidity, the drying process is too quick and the chlorophyll is not broken down completely. If the wrapper has fine cracks, the chlorophyll concentrates there and can likewise no longer be completely broken down. Personally,