The cellulose acetate

The eyeglasses of the designer Piero Massaro, are exclusively made of cellulose acetate, the only plastic material that comes not from petrol but from plant matter such as cotton staple fiber.

In particular, Piero Massaro, uses the rhodoïd, the most precious of all cellulose acetate, as it allows to get amazing, three-dimensional and incomparable colour effects. It’s different from any other material for its transparency, its brilliance of the colors and its magical compositions. Its vegetable origin is also revealed to the touch, with a pleasing warm and silky effect.

Moreover, its production process, while integrated with the most advanced technology, is still closely tied to the manual ability of the best artisan tradition.
The peculiarity of this material allows to work the glasses by hand and thus to offer a really “handmade” piece


The frames are not painted but polished by “tumbling”; frame and temples are placed in special barrels (tumblers) containing fragments of plastic, beech and birch wood, and shaped abrasive pumice that rotate continuously for several days (three to seven to get the effect), rounding off carefully the different components.

To give the eyewear the distinctive sandblasted effect, they proceed with the “blasting”, a mechanical process by which they erode the very top layer of glasses by abrasion obtained with a very thin jet of sand sprinkled on the manually placed glasses , one at a time, in a special machine.

Finally, the polished effect of some parts is obtained manually working on the part to be polished with cotton and abrasive paste wheels, covering the part of the glasses that must be blasted with masking tape.

Lenses of sunglasses

The lenses of Piero Massaro sunglasses are made by Barberini SpA, a world leader in the production of sun filters in optical glass. This is a transparent, non-deformable material known for allowing high-quality vision. Thanks to its transparency, the precision of its optical curves, its rigidity and brilliance, optical glass is unsurpassed even today in the production of precision lenses. Lenses in optical glass are also scratch-resistant, and after chemical tempering, they become shock-resistant as well.

Barberini technology and the company’s long experience in glass production allow for extremely thin cap elements, for the final lens is only 1.9 mm thick, or even 1.8 mm, in the case of polarized lenses, the thinnest on today’s market. We have reduced thickness to a minimum, not only in order to reduce lens weight, but also because the thinner a filter, the greater the optical quality of the lens, entailing less risk of distortion and aberration.