Division 6.4 Preparation of fat-collecting vessel

Dry a vessel (5.9.) together with a few boiling aids (5.10.) to promote gentle boiling during the subsequent removal of solvent in the oven (5.4.) for one hour. Allow the vessel to cool (not in a desiccater but protected from dust) to the temperature of the weighing room (for glass vessels allow at least one hour, for metal dishes allow at least 30 minutes). Taking care to avoid temperature variations, use tongs to place the vessel on the balance and weigh to the nearest 0,1 mg.