High-Contrast Polarizing Plates for Microscopes from China
Specialized polarizing plates for petrographic microscopes used in geological analysis to study mineral birefringence. These plates provide precise rotation control and high extinction ratios for crossed polarization studies. HTS 9001.20.00.00 as they are unmounted polarizing sheets for laboratory optical use.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Include NIST-traceable calibration certificates for polarization angle accuracy (±0.1°)
• Specify strain-free construction and wavelength independence (visible to near-IR) in technical data
• Package with protective sleeves to prevent surface contamination affecting contrast ratios