This standard defines and specifies two types of coal tar creosote for the preservation of timber. Type 1 creosote is intended for general purpose application. Type 2 has a more closely defined distillation range and a restricted residue content and is specially suitable for the treatment of telegraph and transmission poles and structural timber where bleeding in service could present a problem.
MS 696-1981 history
1981MS 696-1981 Specification for coal tar creosote for wood preservation