How to Read an NFPA 704 Diamond-Part 2
PART TWO: THE RED SQUARE The Red square, at the top of the NFPA diamond, tells the reader how flammable the labeled substance is. As I mentioned in Part One, a rating of “0” indicates the lowest level of flammability, while a rating of “4” indicates the highest level of flammability. The ratings in this…… Continue reading How to Read an NFPA 704 Diamond-Part 2