1.60 Index MR-8 Lenses
MR = Mitsui Resin (Misui Chemical Company)
Mitsui Chemicals, Inc. (MCI) contributes to society by providing high quality products and services to customers through innovations and creation of materials while maintaining harmony with the global environment.
MCI has over 30 years of experience in the development and production of innovative optical lens materials for the global market. The optical monomer brand name of MR™ is now globally recognized as a premium high index lens material. In 2008, SDC Technologies, Inc., a California based premium coating material company, became a MCI group company. In 2011, MCI aquired Acomon AG, a leading optical lens material manufacturer well known for its RAV7 Series of R.I. 1.50 lens material. Thus MCI is able to provide a full range of lens material and coating solutions to global lens manufacturers.
MR™ Series ~ Trademark of Safe, Clear and Lightweight Lenses ~
Excellent optical materials with high refractive index, high Abbe number, low specific gravity and high impact resistance are provided by polymerizing monomers of MR™ Series. MR™ Series is especially suitable for ophthalmic lenses and is known as the first thiourethane based high index lens material. MR™ Series offers a variety of products to provide the best solution for optical lens users.
|R.I. 1.60： MR-8™|
The best balanced high index lens material with the largest share of the R.I. 1.60 lens material market.
MR-8™ is suited to any strength ophthalmic lens and is a new standard in ophthalmic lens material.
Comparison of physical properties of lenses made with MR™ Series vs. other optical materials
High Abbe number material like MR-8™ minimizes prism effect (Chromatic aberration) of lenses and provides comfortable view to all wearers.
High Abbe Number Material
Low Abbe Number Material
MR™ Series resin is uniformly polymerized in a glass mold. Compared to the injection molded Polycarbonate lens, MR™ Series lens shows minimal stress strain and offers stress free clear vision.
Stress Strain Observation
(Crossed Nichol method using the polarizing film and white light source)
MR-8™ offers stress free clear vision
- High impact resistance of MR-8™ helps protect wearers form accidental injury.
FDA Drop Ball Test
MR-8™ shows good impact resistance
US-FDA (Food and Drug Administration) Sec. 801.410
“Use of impact-resistant lenses in eyeglasses and sunglasses”
Static Loading Test
Quasi-static loading type test for minimum robustness
MR-8™ shows good static load resistance
- MR-8™ lens shows good tensile strength.
- MR-8™ is widely recognized as the best material for rimless frames.
Tensile test results
MR-8™ lens broke at 72kg tensile force
(All other material lenses broke at smaller forces)
MR-8™ lens showed no deformation of drilled hole
(60kgf Tensile Force)
- MR-8™ is adequate for the long time usage of rimless glasses.
“ Butterfly Test ”for Rimless Frames
Endurance test under cyclic
load for spectacle frames
Broke at 20,000 strokes