I-cream of tartar (i-potassium bitartrate, KC₄H₅O₆) — impuphu ecolekile emhlophe eyimikhiqizo yemvelo yokwenza iwayini, ehlala njengamakristalu ngaphakathi emigqonyeni ngesikhathi sokuvutshelwa. Ekudayeni kwemvelo isiza umbambi-mbala we-alum: isiza ukusabalalisa i-alum ngokulinganayo emcubeni, igcina uboya bemvu buthambile, futhi yenza imibala yokugcina ikhanye kakhudlwana ngokwenza ibhavu ibe nomuncu omncane. Ekubhakeni yisikhukhumezi futhi yenza amaqanda amhlophe ashaywe aqine.