This standard specifies the test methods for silicone series products. This standard applies to HG/T 2765.1 "Type A silica gel", HG/T 2765.2 "Type C silica gel", HG/T 2765.3 "Microsphere silica gel", HG/T 2765.4 "Blue gel indicator, color-changing silica gel and cobalt-free color-changing The required test methods are specified in "Silicone" and HG/T 2765.6 "Type B Silica Gel".