Slim, Strong, and Sophisticated. When frame designs demand minimalism and prescriptions demand power, the MR™ Series (Mitsui Resin) stands alone.
Unlike standard acrylics or CR-39, MR-Series lenses (MR-8™, MR-7™, MR-10™) are based on advanced Thiourethane polymer technology. This unique chemistry allows for higher refractive indices (1.60 to 1.74) while maintaining exceptional tensile strength. It is the premier choice for luxury rimless eyewear and high-diopter prescriptions where weight and thickness are the enemy.
-------------- The "Thiourethane" Advantage ---------------
Standard resins are brittle. Polycarbonate is strong but soft and has poor optics. Thiourethane (MR-Series) solves both problems.
The polymerization of thiourethane creates a unique molecular network that is:
-------------- Material Classifications ---------------
Jings Eyewear offers the complete range of Mitsui MR™ monomers to suit different prescription needs.
-------------- Comparison Matrix ---------------
| Material Grade | Refractive Index | Abbe Value | Tensile Strength | Ideal Application |
|---|---|---|---|---|
| MR-8™ | 1.60 | 41 (Best) | High | Rimless, Nylor, Daily Wear |
| MR-7™ / MR-10™ | 1.67 | 31 | Very High | High Prescriptions (> -4.00D) |
| Standard Acrylic | 1.56 | 36 | Low (Brittle) | Full Rim Frames Only |
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