Ⅰ. Stains
a. Product surface stains larger than 1 mm in size;
b. Stain type: black spots, insects, dark glue, dark oil and etc.
Ⅱ. Transfer layer detection
a. Missing, corner folded, skew
b. Position deviation >5mm; single-piece width deviation ±3mm
Ⅲ. Pad core detection
a. Missing, corner folded, skew, insufficient
b. Position deviation; corner folded
IV. Wings
a. Abnormally folded inside or outside
Contamination detection ADL detection
Pad core missing Black splicing tape detection