First,the bending of flat tempered glass shall not exceed 0.5% when arched and 0.3% when wavy.Sec -oned,impact resistance,take 6 pieces of tempered glass samples for testing,the number of samples dam -aged is not more than 1 piece is qualified,more than or equal to 3 pieces is not qualified.When the failur -e number is 2,another 6 shall be taken for testing,and all 6 shall not be damaged to be qualified.Finally d -ebris state,take 4 piece of tempered glass sample testing,each sample pieces in the area of the 50mm*5 -0mm number must be more than 40,and allow a small rectangular pieces,its length is less than 75mm,its its department is not a knife,extends to the edge of glass on the edge of the rectangular pieces and form the angle is not more than 45。
