Bristles, generally speaking, are indestructible except by fire, but if bristles have been wetted and are left in their wet condition for any length of time they will heat, and any delay in treatment will result in rotting. Bristles, when wetted, should be opened up and dried as soon as possible, and if this is done quickly enough no damage will result. Otherwise there is nothing that, in the ordinary course of events, would render bristles useless. Staining by oil can be removed by a proper process, but this should be left to a bristle expert. If light-colored bristles are stained and subsequently thoroughly washed, leaving a partial stain, they can be made darker and their value is in no way impaired. Bristles which may have been rendered useless for the job originally intended may be perfectly satisfactory for another job.
Bristles are liable to attack by moth and vermin, but if wrapped in naphthalene-treated paper and packed with flaked naphthalene this will prevent any possibility of their becoming vermin infested during the voyage.
Value of bristles varies in types and sizes, and this must be studied in arriving at the degree of depreciation. See also IMDG Code & US CFR.
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