Introducing the Gray Test Card for Industrial and Lab use, a versatile tool designed to aid in visual inspection and calibration processes. This card features an 18% reflectance gray surface, providing a reliable reference point for color and brightness adjustments. The precision-etched 0.8mm line width cross lines offer a clear visual guide for assessing image sharpness and focus. Crafted with durability in mind, this Gray Scale Card Detection Card is an essential accessory for professionals in various fields, including photography, printing, and quality control. Its compact size makes it easy to carry and use in any environment. With its accurate grayscale and precise markings, this card ensures consistent and reliable results, streamlining your workflow and enhancing the quality of your output. Invest in this indispensable tool and elevate your visual inspection and calibration capabilities.