With patience and the right amount of pigment and fixer according to the capacity of the washing machine I could dye without obvious halos the covers of my sofa. 3 machines, 4 boxes of large format dye and a significant economy. By putting well against the amount of fixer salt according to the use of water in your machine, not the amount of dye. I added more than reflected in every 500g machine because I have a 7 kilos. Result nearly flawless if not in full sun there are significantly lighter areas.