文档介绍：Defective products investigation report
The description of defective products
On Jan. 6th2013, 809 cartons (405000 pDefective products investigation report
The description of defective products
On Jan. 6th2013, 809 cartons (405000 pieces) of plastic bags were sending to ***Shanghai company, among which 407 cartons (244200 pieces) of plastic bags were small size and the rest were large size. The plastic bags have reached ***Japan company. Customer has now detected 120 pieces of defective products with red ink on the white , they have detected 1/3 serious plate shifting defective products when spot-checking (the detailed quantity is unknown for products were without fully inspection) :
The first problem: the defective products with red ink on the white edge; the second problem: serious plate shifting defective products.
The analysis about cause of defective products
1. The cause of the first problem:
The situation that the ink of the other colors sticks to the white edge will show up in the process of printing because of four-color overlay gravure printing. But normally the operators will pick them out when making bags.
The bags with ink had not been picked out because of the ignorance of bag cutting operators and checkers.
2. The cause of the second problem:
The plate shifting emerges in the process of printing because of four-color overlay gravure