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150
Subsequent to pasteurisation or sterilisation the mixture shall
be reduced to a temperature of not more than 45°F. within 1½ hours
and shall be kept at such a temperature until frozen, after which it
must be kept at a temperature not exceeding 28°F. up to the time
of sale.
During the previous year the Ice Cream (Heat Treatment, etc.)
Regulations, 1963, were introduced to allow the addition of sugar
to sterilised or pasteurised mixtures used in the manufacture of
ice cream.
Ice Cream Sampling. (Bacteriological Examination).—As in the
previous year the Council continued to make use of the Public
Health Laboratory Service as provided for under the National
Health Act and 37 samples were submitted for examination and
the ice-cream graded according to the Ministry's provisional
Grading Scheme. The grading is based on the results of the Methylene
Blue Reductase Test and a summary of this year's reports is
given below :—
Samples Time taken to Reduce Provisional
taken Methylene Blue Grade Observations
15 4½ hours or more 1 Satisfactory
5 2½ to 4 hours 2 Sub-standard
3 ½ to 2 hours 3 Unsatisfactory
4 0 hours 4 Most Unsatisfactory
10 Ice-lolly Plate count and bacteria reports
showed these samples to be satisfactory.
On receipt of a Grade 3 or 4 report it is the practice in this
Borough to obtain further samples from a vendor before administrative
action is taken. It was not necessary during the year to have
recourse to "administrative action." This latter observation may
seem somewhat contradictory in view of the number of unsatisfactory
samples listed in the preceding table, but following last year's
inconsistent results in connection with "soft" ice cream, it was
decided to test still further the suitability of this type of ice cream.
Of the 37 samples taken during the current year, 18 were of
the "soft" variety, 7 of which were reported upon as being
unsatisfactory and were graded as such in accordance with the
Ministry's scheme. Any danger to health was discounted in these
cases by the introduction of a plate count but the results obviously