20pcs A4 Test Focus Paper for Laser Marking, Welding, Cutting

About this item Size: 210mm x 285mm(8.3″ x 11.2″); Quantity: 20pcs / pack Laser welding machine dimming path, laser hit on this paper can see the circular spot, display clearly. This paper is double-sided black, used for laser welding machine, cutting machine top dimming, light spot, used to adjust the machine proportion BOX, used to identify the circle of light spot, so as to achieve the best effect. Laser dimming paper and spot debugging paper are widely used in the performance debugging of Laser Marking Machine, Laser Welding Machine, laser cutting machine, spot quality debugging, marking and carving sample testing, etc. The laser testing paper can also be used in the performance debugging of other light sources.