The Shield

The shield is a poly carbonate face shield. The link to purchase the product on Amazon will be shown bellow. (Note: I have no connection to the company that produces this shield)

Replacement Face Shield, 8"x 15.5"x .040, Clear Polycarb, Model 15151 By ERB

Why this shield?

Dimensions

This product has the perfect dimensions for a baseball hat. The bill of a baseball hat is just about fifteen inches. The eight inches allow for the shield to cover the face. The ~1/32 inch thickness allows the shield to be easily pliable with the use of heat while allowing it to be sturdier longer.

Polycarbonate

Polycarbonate is one of the many pliable plastics that are used for face shield. Polycarbonate was chosen for this project due to its unique ability to be opaque to Ultraviolet frequencies. This means that the harmful rays from the sun with cause skin cancer cannot penetrate the shield. This is extremely useful for people with occupations with large exposure to the sun. Below is a diagram found from this research. The red is circling the Ultraviolet frequency, from ~400 nm to ~100 nm. One can tell that the transmission in the Ultraviolet frequencies the transmission of light is 0% (opaque). It is important to note that this attachment is not a replacement to sunscreen protocols. Below one can also find a graphic of the electromagnetic spectrum and a statement about UV transmission through the Ozone from NOAA.

“The UV portion of the solar spectrum is generally divided into three regions: 1) UV-A (315-400 nm); 2) UV-B (280-315 nm); and 3) UV-C (< 280 nm). The UV-A is essentially unaffected by ozone absorption; the UV-B is strongly affected by variations in ozone; and the UV-C is almost entirely absorbed before it reaches the surface.”

- NOAA

Precut

The shield is precut to the best dimensions and cut with various openings for the clips. These cuts will allow for the printable clips to fit in without users having to use drills.