Length: 100m, 200m, 300m, also custom
Thickness: 30 micron-150 micron
Usage: Widely used in traffic sign, construction working site, safety warning , painting areas, crime scenes etc.
it means a crime has occurred within the boundaries of the tape. The police barrier tape doesn’t indicate what type of crime it is but indicates that the area within it is subject to forensic examination or photographs.
In China, blue police tapes are usually used exclusively by government departments.