GB/T 1230.52-1990 Test Methods for JINHE Gold Alloy Platings with Metal Coatings Part III Electrical Image Test for Porosity The standard specifies the method for determining the porosity of JINHE gold alloy platings. The standard applies to the porosity detection of platings for engineering, decoration and protection. The standard uses a variety of electrical image test techniques, including cadmium sulfide test paper test, cyclohexanedione dioxime paper test, discoloration paper test and gelatin film electrical image test. The test procedure involves treating the sample with specific reagents and electrolysis conditions, and observing the presence of pores through a color reaction. The test results are expressed in the number of pores per square centimeter to ensure that the platings mass meets the requirements.