GB/T 18751-2002 Magnetic anti-counterfeiting ink standard specifies the terms, definitions, symbols, product classification and its technical requirements, test methods of magnetic anti-counterfeiting ink. The standard is applicable to magnetic anti-counterfeiting ink of various printing plates, especially the use of inks with magnetic powder material as functional component. The standard covers the requirements of marking, Encasement, transportation and storage. At its core is the realization of anti-counterfeiting function through magnetic component for special recording, marking and marking. The standard also defines key terms such as "magnetic anti-counterfeiting ink" and "coercivity", the latter refers to the minimum magnetization force required for magnetic domain reversal.