How to choose lenses on sunglasses frame?

We always use AC demo lenses for optical frames, but for sunglasses, there are MORE options. Below is a guide to your selection.

Sunglasses lens material:

  • CR-39: High optical quality and tinting flexibility
  • Nylon: Great clarity and freedom of design
  • PC (Polycarbonate): Impact resistance and excellent hard coating durability
  • Polarized technology: improved vision incorporated in the above-listed materials for glare reduction and safe
  • TAC Polarized: Cheapest polarized option

Sun lens colors:

– Solid (MONI)– Gradient– Double gradient(two tone)

Additional Coatings if necessary:

REVO (add a mirror coating on the base color )
Anti-reflective (AR) coating
Anti-Scratch-resistant coating (protect lenses get scratched, normally use for REVO color)

FILTER CATEGORY:

According to European standard NF EN ISO 12312-1 2013 (sunglasses for general use), there are 5 categories rated from 0 to 4, based on the transmission percentage, which means how much light the lens lets through.

Normally category 3 is well suited to all light conditions for daily use, for the others, it depends on how you use them.

Our Sun lenses brands cooperation partner: Zeiss& Ever Young

After getting the lenses from the lens supplier, we will also strictly quality check before we cut and assemble the glasses.

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How to use sustainable materials to make eyeglasses and sunglasses

Let’s talk about the sustainable materials for eyeglasses frame today.

100% RPET

What’s RPET? PET (polyethylene terephthalate) is the traditional plastic material used in packaging, such as plastic bottles. The “R” in front of PET means that the eyeglasses are made of RECYCLED PET (post-consumer plastic bottles). Normally 5-6 recycled bottles can be made into 1 pair of RPET eyewear.

Using the existing resources can not only reduce waste and give them a second life but also reduce environmental pollution.

PLA Eyeglasses-Plant Based, compostable/biodegradable

PLA, polylactic acid, is a kind of biopolymer material, which is usually made of starch from plants such as corn. We can use it to produce containers with similar properties and transparency to plastic. It’s eco-friendly for its unique performance.

WHEAT STRAW Eyewear –Plant-Based, compostable/biodegradable

The main material comes from organic wheat straw fiber, crushing selected rice husk, and mixing PP material by the machine.

The materials mentioned above are some traditional injection options.

Below I will introduce some advanced choices you may be more interested in,

which are also the focus of our factory.

BIO/ ECO – Friendly Cellulose acetate glasses frame

Cellulose acetate glasses frame is a plant-based biopolymer created from wood pulp and cotton, which makes it much more environmentally friendly than the cheap plastics used in most mass-produced eyewear. Bio-acetate means a higher percentage of cotton and wood. On top of that, it’s stronger, more comfortable, and more resistant to fading. M49 from Mazzucchelli is the most famous series you might know. https://www.mazzucchelli1849.it/pages/m49-bioplastic

Laminated wood sunglasses and eyewear

Instead of solid wood sunglasses, we highly recommend the updated process of laminated wood which is much stronger and environmentally, more colorful and you can combine it with acetate/metal/titanium spectacle frame to have fashion meet function.

Glasses accessories

We use the green materials not only for the glasses frame but also for the accessories.

BIO POL BAG/ RPET Cleaning cloth/pouches/Recycled Paper/wood/bamboo Packaging all available

A small change can make a big difference. LEAO has been always looking for green materials to make glasses and trying to make our own contribution to building a more sustainable future for the glasses industry.

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how a manufacturer to produce acetate glasses frame.

Leao eyeglasses show you how a manufacturer to produce acetate glasses frame.

In the beginning, a large acetate material was being sliced into sheets.

Then use the automatic machine to combine the sheets and nose parts together to have a frontal shape.

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After that, we use the high-tech CNC machine to engrave the frame, the computerized numerical control will make sure all the sizes and details are exactly the same as the drawing.

Then the glasses frames are heated and curved by using a pneumatic-press

The CNC engrave the slot to fitting hinge

It’s time for the temple process, the wire core is being inserted into the cellulose acetate glasses temples.

This is the tumbling process, all the frames and temples are polished for 4 entire days to make them smooth by using beech wood, pumice stone, and tumble oil.

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After the auto polishing, we start hand polishing and cleaning.

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Assemble is the final process, all the glasses are adjusted well before we pack.

As a professional acetate glasses manufacturer, quality is our first guarantee, every process is completed by experienced worker and every glasses is inspected strictly before delivering to you.

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