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 quality. The Zahn Cup is a commonly used tool for liquid viscosity measurement. The viscosity value obtained through this method is typically expressed in seconds and can be converted to centipoise using appropriate conversion methods. Standard Test Method: ASTM D4212 - Dip-Type Viscosity Cups. The test liquid should be maintained at a temperature of 25°C, with temperature fluctuations not exceeding ±0.2°C during testing. To use: - Select the appropriate cup number based on the expected viscosity range of the liquid. - Fully immerse the cup into the test liquid. - Measure and record the liquid temperature inside the cup using a thermometer, then remove the thermometer. - Use the index finger to lift the cup vertically by the handle ring, quickly and steadily. - Start the stopwatch as the cup leaves the liquid surface. Maintain the cup no more than 15 cm above the liquid level during drainage. - Stop timing at the moment the steady stream of liquid first breaks. Maintenance: With proper care, the Zahn Cup can last for many years. Clean with a soft cloth only—do not use wire brushes, sandpaper, or other abrasive materials. It is essential to clean the orifice carefully 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 cup, precision-drilled nozzle, fine craftsmanship, accurate measurement, durable. Models: Zahn Cup No. 1, No. 2, No. 3, No. 4, No. 5 (No. 8 is for special liquids) Measuring range: 5–1840 mm²/s (centistokes) Conversion: Centistokes × specific gravity = centipoise Model Details: - Model No. 1: Measuring range (mm²/s): Approx. 5–56 Nozzle diameter: 2.00mm Application: Very dilute liquids Flow time (s): 35–80 - Model No. 2: Measuring range (mm²/s): Approx. 21–231 Nozzle diameter: 2.74mm Application: Thinners, mixed paints, varnishes Flow time (s): 20–80 - Model No. 3: Measuring range (mm²/s): Approx. 146–848 Nozzle diameter: 3.76mm Application: Medium viscosity liquids, mixed coatings, varnishes Flow time (s): 20–80 - Model No. 4: Measuring range (mm²/s): Approx. 222–1110 Nozzle diameter: 4.26mm Application: Thicker liquids and mixtures Flow time (s): 20–80 - Model No. 5: Measuring range (mm²/s): Approx. 460–1840 Nozzle diameter: 5.28mm Application: Very thick liquids and mixtures Flow time (s): 20–80 Note: 1. Due to manual measurement, a tolerance of 0.1–0.3mm may occur. 2. Color variations may appear due to differences in monitor displays. Actual product color may slightly differ from the image. Satisfaction Guarantee: Our priority is to provide a clear, honest, and complete description of our products. We aim to ensure a pleasant and worry-free shopping experience. If you have any questions or concerns about the product, please . We are committed to resolving any issues promptly. Your satisfaction is important to us, and we strive for a positive 5-star transaction experience. Please reach out before leaving negative feedback. Refund Policy: We accept returns if the product is not as described or if the item arrives damaged. Please provide photos for verification. A full refund will be issued upon confirmation.