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material with a hard, smooth face, free from ledges where dust can
accumulate. The floor should be even and have a suitable fall to a gullyoutside
the premises. All surfaces must be washable and kept clean,
free from dust, splashes of milk, or of the ice cream mix. Windows
and ventilating grids should be screened with fine wire gauze or two
thicknesses of butter muslin to exclude dust and flies. The water supplymust
be direct from the main, and have a suitable sink with an efficiently
trapped waste in connection with it. As an alternative to the above
arrangement, the sink waste may discharge into an open channel running
to a gully outside the building.
The general surroundings should be kept clean, free from accumulations
of refuse and disused containers or plant.
Personal Cleanliness.—Strict personal cleanliness—hands, body and
clothing—is essential. Overalls, preferably white, are recommended
for those handling the mix, the same to be kept clean and washed at
frequent intervals.
A regular system as regards personal cleanliness is advocated.
Before commencing work the hands should be thoroughly washed in hot
water and soap, and the finger nails (which should be kept short) well
scrubbed. Finally, the hands should be rinsed in cold water and dried
on a clean towel. Care must be taken that before using the lavatory
the overalls must be taken off. Before resuming work the procedure
will be the same as before, this being of the utmost importance. Smoking,
coughing or spitting must be avoided where the cream is exposed, and care
taken that perspiration does not drop into the mix.
Utensils.—All machinery and utensils should be sound and thoroughly
cleansed before starting work. Damaged and rusty containers are quite
unsuitable and must be replaced by new as often as may be necessary.
Modern ice-cream plant is designed to avoid any possibility of contamination,
and the best is invariably the cheapest in the end. Zinc
freezers have been found to give rise to a certain amount of metallic
contamination. The present method of removing with a swab the scum
formed is very unsatisfactory and dangerous; where such freezers are
still in use, small pieces of rag, thoroughly clean and sterile, should be
kept in a properly stoppered bottle used only for this purpose. Zinc
containers should be replaced by more suitable ones as soon as possible.
Monel-metal, stainless steel and tinned steel, seamless or made in one
piece, are more hygienic and safer.