FRAME QUALITY

Adjustable, comfortable, resistant – glasses frames must fulfil many requirements. Here, the choice of a suitable material plays an essential role. In addition, the frame should also satisfy any aesthetic requirements.

With the manufacturing of Filtral sunglasses and reading glasses, we distinguish between two groups of frame materials.

PLASTIC FRAMES

Made from polycarbonate (PC), for example
Highly resistant
Wide variety of designs available as more striking frame shapes can be made using injection moulding processes

METAL FRAMES

Nickel silver (copper-nickel-zinc alloy): high corrosion resistance, strength, good workability, high elasticity
Stainless steel: high stability and corrosion resistance, good skin compatibility, good malleability and adjustability, coating available in many colour variants
Hard brass (copper alloy)