“ A book is signed ” Refers to chemical safety technical specifications and safety labels.

Chemical Safety Technical Specifications (SDS), also known as Material safety Technical specifications (MSDS) in some countries. SDS provides information on chemical safety, health and environmental protection, recommends protective measures and emergency response measures, and is an important carrier for chemical suppliers to convey basic chemical hazard information to downstream users. The national standard "Chemical Safety Technical Specification content and project sequence" (GB 16483) and "Chemical Safety Technical Specification preparation Guide" (GB 17519) stipulate the content and method of SDS preparation.

The chemical safety label is a combination of text, graphic symbols and codes to indicate the dangers and safety precautions of chemicals. The international Regulations for the Preparation of Chemical Safety Labels (GB 15258) specify the requirements for the preparation, production and use of safety labels.