Origin: Mainland China Cup body material: Stainless steel Number of cups: 1, 2, 3, 4, 5 Cup size: Approximately 44ml Total length: Approximately 345mm Cup inner diameter: Approximately 33mm Cup height: Approximately 57mm Product Usage: The immersion Zahn cup viscosity cup is manufactured in accordance with the American Society for Testing and Materials (ASTM) D4212-93 standard, "Standard Test Method for Dip-Type Viscosity Cups." This viscosity cup is designed for measuring the viscosity of Newtonian or near-Newtonian liquids. It is widely used in the coatings, ink, gravure, letterpress, lithographic, flexographic, and screen printing industries for viscosity measurement before or during application. It helps maintain consistent viscosity within the desired range to ensure product performance and color consistency. The Zahn Cup is a common tool for liquid viscosity measurement. The dynamic viscosity is typically expressed in seconds and can be converted to centipoise using appropriate conversion methods (note: kinematic viscosity unit is mm/s, equivalent to centistokes). Standard Test Method: ASTM D4212 Dip-Type Viscosity Cups. The test liquid should be maintained at 25C, with temperature fluctuations not exceeding 0.2C. Select the appropriate cup number based on the expected viscosity range of the liquid. Immerse the cup completely into the test liquid. Measure and record the liquid temperature inside the cup, then remove the thermometer. Using the finger loop on the handle, lift the cup vertically and steadily. Start the stopwatch as the cup exits the liquid surface. Keep the cup no more than 15 cm above the liquid level during drainage. Stop timing when the continuous flow of liquid first breaks. Maintenance: With proper care, the Zahn Cup can last for many years. Clean with a soft cloth onlydo not use wire brushes, sandpaper, or abrasive materials. Pay special attention to cleaning the orifice to remove residue, and avoid scratching the internal surfaces. It is recommended to clean the cup after each use, except during repeated testing. Model and Technical Parameters: Features: Round head stainless steel construction, precision-drilled nozzle, accurate measurement, durable design Models: Zahn No. 1, No. 2, No. 3, No. 4, No. 5 (No. 8 is for special liquids) Measuring range: 51840 mm/s (centistokes) Conversion: Centistokes specific gravity = centipoise Model No. 1 Measuring range (mm/s): 556 Nozzle diameter: 2.00mm Application: Very low viscosity liquids Flow time (s): 3580 Model No. 2 Measuring range (mm/s): 21231 Nozzle diameter: 2.74mm Application: Thin liquids, diluted paints, varnishes Flow time (s): 2080 Model No. 3 Measuring range (mm/s): 146848 Nozzle diameter: 3.76mm Application: Medium viscosity liquids, coatings, varnishes Flow time (s): 2080 Model No. 4 Measuring range (mm/s): 2221110 Nozzle diameter: 4.26mm Application: High viscosity liquids and mixtures Flow time (s): 2080 Model No. 5 Measuring range (mm/s): 4601840 Nozzle diameter: 5.28mm Application: Very high viscosity liquids and mixtures Flow time (s): 2080 Note: 1. Due to manual measurement, please allow a tolerance of 0.10.3mm. 2. Color may vary slightly due to monitor display differences. For any questions about this product, please . We aim to provide a clear, honest, and complete description of our products and are always ready to assist. Satisfaction Guarantee: Your satisfaction is our top priority. We strive to provide a smooth, pleasant, and worry-free shopping experience. If you are not satisfied with your purchase, please before leaving negative feedback. We will do our best to resolve any issues promptly. Refund Policy: We accept returns if the product is not as described or if damaged. Please provide photos of the issue. A full refund will be issued upon verification.