In the early stage, the frame material was mainly made of metal and titanium, and there were stainless steel, titanium metal, white copper, plastic,acetate and monel, nickel alloy and other materials.
The frame also has many breakthroughs in technology and application materials. The lens with memory alloy frame can maintain its shape, even if the buckling will not break, so that the glasses have a longer life, and reduce frame breakage possibility and cause inconvenience to wearing. To apply a spring to the hinged position of the temples (arms) also makes the glasses more durable.
Titanium-made and carbonfiber frames are lighter and more corrosion-resistant, avoiding tarnishing due to sweat-on-metal corrosion during long-term wear.
Nowadays,nations,organizations and people are increasing caring about environment and sustainable.Bio-degradable acetate,plastic and recyclable materials have been applied to eyeglasses manufacturing.YMO eyewear has been concentrated on eco-friendly materials on eyeglasses frames since 2016.YMO has been successfully mastered the matured technique on manufacturing glasses with new materials and eco-materials.