GB/T 20810-2018 "Toilet Paper (Including Toilet Paper Base Paper)" applies to toilet paper and its base paper, but not to facial tissues, kitchen towels, etc. It specifies terms and definitions, classification, requirements, test methods, inspection rules, as well as labeling, packaging, transportation, and storage. The standard clearly defines requirements for physical properties (such as grammage, brightness, tensile index), chemical properties (such as lead and arsenic content), and microbiological indicators. Tests are to be conducted under standard atmospheric conditions using corresponding methods, and sampling shall be performed in accordance with GB/T 2828.1.