Fully resistant to a specified agency, either by reason of physical structure or inherent chemical non-reactivity, or arising from a treatment designed to impart the desired characteristics.
Note 1: Proofing treatments are defined by specified limits ascertained by test, and the use of the term related to the limiting conditions.Note2: ‘Resistant’, ‘retardant’ or ‘repellent’ are appropriate alternatives when the resistance is less than full
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