Table 3.

The 10 pairs of straws from the following packets could not be discriminated using comparison microscopy of manufacturing marks.

Packets	Remarks
“HG-1”, “HG-2”	Bought on the same day from the same commercial outlet.
“RS-2”, “RS-3”	Bought on the same day from the same commercial outlet. “RS-1”, which was also bought from this outlet on the same day, could be discriminated.
“SSP-1”, “SSP-2”	Bought on the same day from the same commercial outlet. Bought on the same day from the same commercial outlet. Bought on the same day from the same commercial outlet.
“SSP-1”, “SSP-3”
“SSP-2”, “SSP-3”
“STP-1”, “STP-2”	Bought on the same day from the same commercial outlet.
“WJ-1”, “WJ-2”	Bought on the same day from the same commercial outlet. Bought on the same day from the same commercial outlet. Bought on the same day from the same commercial outlet.
“WJ-1”, “WJ-3”
“WJ-2”, “WJ-3”
“ZONE-1”, “ZONE-2”	Bought 8 days apart from the same commercial outlet. “ZONE-3”, which was bought from this outlet on the same day as “ZONE-2”, could be discriminated.