WHAT IS CR39?

CR-39 plastic, or” Columbia Resin #39” named after a resin formulation used by the original manufacturer, has become one of the most common plastics used to make lenses.  CR-39 is an optical degree for plastic polymer which is measured by the light weight, chemical resistance properties and tint-ability. CR-39 is more scratch resistant than polycarbonate.  

But please note it does not mean CR-39 will not scratch, if the lenses are not taken good care of lens can be scratched.ca

WHY DO WE USE AND TRUST CR-39 TO MAKE OUR LENSES?

• It has High abrasion resistance, in fact the highest abrasion/scratch resistance of any uncoated optical plastic.
• Has a High refractive index of 1.498 allowing us to provide superior sun protection.
• CR-39 more scratch resistant than polycarbonate so our glasses can go further.

WHY ARE WE TELLING YOU ALL OF THIS?

Our answer is a SIMPLE ….Because we want you to know that IMPERIAL OPTICS is dedicated to providing you with

QUALITY YOU CAN TRUST

Since CR-39 lenses are made by pouring liquid polymer into a mold of optically treated glass, it takes on the same characteristics as glass. As such, it is considered almost as pure as glass and provides great visual quality. CR-39 lenses provide very little visual distortion. They are not as visually accurate as glass but better than polycarbonate lenses of, they will also scratch.