This specification covers requirements for the following two types of boron timber preservatives:
Type I. A sodium borate of a composition corresponding approximately to that of disodium octaborate tetrahydrate (Na2B80,3.4H20).
Type II. A mixture of borax and boric acid.
NOTE: The attention of users of this specification is drawn to the following:
The type of preservative required must be specified in the order or contract (see 3.2).