- Function and benefits: Simulates the printing press effect for accurate color proofing, supporting color matching, ink improvement, testing water-based ink performance, and shade verification. - Adjustment and operation: Turn the nut knob at the bottom of the manual tester gradually to adjust the relative position of the roller. A spring mechanism in the handle provides precise, repeatable roller pressure. - Construction and design: Manual colour proofing machine with a metal screen roller and a rubber roller, covered surface width of 70 mm. Novel design, easy to use, and offers reliable proof authenticity. - Wet film thickness control: The larger the number of lines, the lower the wet film thickness of the coating; the smaller the number of lines, the greater the wet film thickness of the coating. - Use scenarios: Pre-press color proofing for color-critical jobs; testing and comparing water-based inks on test substrates; evaluating ink film thickness and shade consistency across prints.