GB/T 1303.1-2009 as the beginning of the standard system of thermosetting Resin industrial hard laminates for electrical use, systematically sorted out the core elements of this type of sheet. It precisely defines the definition, establishes the classification system according to Resin, reinforcement materials, etc., and standardizes the naming rules; from raw material performance, manufacturing process standards, to Appearance, dimensional tolerance put forward general requirements; clarify the inspection rules, including inspection items, sampling methods, etc.; It also stipulates product labeling, Encasement, transportation and storage, etc., to build a framework for the entire standard system, and also provides fundamental guidance for industry production and mass control.