After ten hours the packs were checked for evidence of defrosting, and again after another 10 hours.Ī two-litre Coca-Cola bottle was placed in the cooler to ascertain packing height. Where possible, coolers were set to their lowest possible temperature. Readings were taken every half hour for five hours until a constant temperature was reached.Īfter the snowflake test finished and the fridges reached constant freezing temperature (0☌), a packet of frozen chicken drumsticks was placed in each cooler. The fridges were set to 0☌ if possible or simply switched on simultaneously. The second beer remained sealed and was monitored to see when the snowflake temperature indicator activated (or changed colour from white to blue).

One beer was opened in order to place a thermometer inside and read the temperature of the beer at regular intervals all beers read 19☌ when the test kicked off. Two Castle Lite beers were placed into each of the coolers.