CONDENSED MILK - Damage to labels and tins by rust may be caused by milk leaking from the seams of the tins. This can be proved by a vacuum test. Sweating of the tins with consequent rusting and spotting of labels is fairly common, this varying with the time of the year, being worst in consignments shipped from Europe in midwinter. The sweating is primarily due to different rates of change in temperature of the milk, the tin and the wood cases, all of which are probably at a very low temperature at the time of loading, but commence to warm up at different speeds as the vessel moves into warmer weather. Generally, many of tins can be freed from rust and relabeled. A brownish discoloration may be indicative of the age of the contents. See also CANNED GOODS.
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