10 Pieces Testing Paper Black Double Sided Dimmer Paper Optical Fiber Photo Paper Fiber Optic Optical Cable for, Quantitative Filter Paper Fiber Optic Compatible: Our paper is suitable for fiber equipment to meet the needs of more professional fields. [Wide Applications] Suitable for use in semiconductor marking machines, fiber marking machines, cutting machines, UV marking machines, beauty equipment, etc. [10 Pcs Set] This set includes 10 double sided black testing papers with size of 210 x 285mm (8.3 x 11.2 inch), providing ample supply for testing needs. 1. [10 Pcs Set] This set includes 10 double sided black testing papers with size of 210 x 285mm (8.3 x 11.2 inch), providing ample supply for testing needs. 2. [Dual Sided Usage] The black marking test paper is designed for double sided use, allowing for efficient testing of equipment. 3. [Clear Printing Area] The test paper features a white printing area with clear spot edges, ensuring easy identification. 4. [Wide Applications] Suitable for use in semiconductor marking machines, fiber marking machines, cutting machines, UV marking machines, beauty equipment, etc. 5. [Versatile Usage] Ideal for adjusting the performance and spot quality of marking machines, welding machines, cutting machines, as well as testing the spot adjustment and energy of beauty equipment, eyebrow washing machines, etc. Specification: Item Type: Testing Paper Material: Paper Color: Black Size: Approx. 210x285mm / 8.3x11.2in PackageList: 10 x Testing Paper Note: Double sided black engraving test paper is suitable for welding machines and cutting machines with a power of 2W to 500W. The higher the power, the more sensitive it is, and the test paper will only show traces when the machine is in use. Power over 2W. If using a higher power device, start testing from low power first, gradually increase the power until the appropriate effect appears, to avoid excessive power piercing the test paper.