What are the requirements for the sign on the cement packaging bag?

The cement packaging bag shall be clearly marked with: implementation standard, cement variety, code, strength grade, manufacturer's name, production license mark (QS) and number, factory number, packaging date and net content. The name and strength grade of cement should be printed on both sides of the packaging bag in different colors according to the variety of cement. Portland cement and ordinary portland cement should be red, while slag portland cement should be blue. Volcanic pozzolanic Portland cement, fly ash Portland cement and composite Portland cement are black or blue.