Ukutyibilika okuphakathi, ukumelana kakuhle kweekhemikhali, uxinzelelo oluhle kakhulu lokusingqongileyo - ukumelana nokuqhekeka, iimpawu ezilungileyo zoomatshini kunye nokumelana nobushushu, kulula ukucutshungulwa, kwaye inomjikelo omfutshane wokubumba.