I just tried dyeing some old white T-shirts. I just bought a packette of yellow dye at the dollar store. Put about 1 cup pf hot tap water in a jar , added the dye closed lid & let it sit overnight. Today I filled my washer with hot water on smallest load. Added my dye mixture agitated a little added mt shirts (3). Meantime I stirred about a cup of salt in a small bowl & added this carefully 9didn't let get directly om clothes) to my rinse cycle. Looks really good no mottled effect as all dye was dilited. As soon as I get some blue I want to try muslin.