Whether it's metal or plastic, the material in your frames makes a difference in
your appearance. No matter what material of you choice is a desicion of teste, but
to know to know the material idea before it goes on your face.
Metal
The metal shapes offer a sleek silhouette that plastic glasses usually can't achieve,
including cut-out frames and delicate latticework. The metal frames dominate the
market with about 70% of the sales. It produces stronger solders and holds its coatings
better than Nickel Silver. This results in colour that is less likely to wear and
chip off. Most retailers wouldn’t have a clue about the difference between these
materials. If asked they could couldn’t tell the difference (unless it said on the
front of the dummy lens). They rely on the wholesale price of the frame to give
a clue as to quality, and like you they rely on the branding.
Titanium, Monel, Nickel Silver
A beautiful
material. It’s very light, strong, easy to adjust, comes in a wide range of colours.
It resists corrosion and is great for hot, humid, sweaty environments. It is also
nickel free which means that it is hypoallergenic. It comes in a couple of grades:
100% Titanium and Beta Titanium (which is about 95% pure Titanium). From the wearers
perspective there is no difference between the grades.
Plastic
glasses often come in thick, chunky styles for bold and dramatic looks. Plastic
eyeglasses come in endless color options to match any outfit or mood.
Plastic frames are also known as zyl or acetate. They are made from Cellulose Acetate which is
a natural material made from cotton and wood flake. It main advantage is that it
is a fantastically versatile material: it comes in a huge variety of colours and
patterns. Acetate is easy to adjust with little or no heat and it holds its shape
well. For example, your trusty hairdryer could heat up the frame enough to be safely
adjusted. Plastic does however get brittle and discolour with age the effects of
skin acids. This is why retailers will always shake their heads with a dark look
when you ask to re-lens your existing frames with your new prescription. “It’s at
your own risk” they say as if daring you to contravene the laws of nature.