1.This machine is applicable to the 3 layer disposable facemask，without printing ，made from woven and non-woven material with light color.(not suitable for the dark colored face mask) .The feeding distance between masks should be larger than 400mm, inspection speed ≥100PCS/min.

2.The imaging contrast with standard samples must be higher than 40.

3.Imaging contrast is 0-255，0 is pure black，255 is pure white，1-254 is the Grey level.

4.With the inspection speed≥100PCS/min, the minimum detectable size is 0.3mm*0.3mm.