How Do You Read A NFPA Label?
How Do You Read A NFPA Label? NFPA 704 warning labels Hazard ratings range from 0 to 4, with 4 being the most hazardous. These are used for 3 categories: health (blue), flammability (red), and instability (yellow). For example, if the substance has a low risk for flammability, a “1” may appear in the Flammability