What does APET mean?
PET = Polyethylene terephthalate Polyethylene terephthalate is a thermoplastic resin of the polyester family, depending on its processing and thermal history, it may exist both as an amorphous (transparent) and as a semi-crystalline (opaque and white) material.
Amorphous Polyethylene terephthalate = APET.
What means PET-GAG film ?
GAG is a smart coextrusion of APET and PETG, this material offers the benefits from both APET and PETG to guarantee optimum processing.
Our large format EU made lenticular sheets are extruded in PETG.
What is LPI?
Talking about our lenticular plastic sheets, LPI means “lenticules per inch” (75 LPI, 62 LPI).
1 inch = 2.54 cm or 25.4 mm
Some people will calculate the size of the lenticules in mm: 75LPI = 0,333mm; 100LPI = 0,25mm…
Of course, the same letters (LPI) are used by the offset printers about screen resolution (raster).
What is a “barrier screen”?
The first autostereoscopic method to appear was the “barrier” technique, which involved dividing two or more pictures into “stripes” and aligning them behind a series of vertically aligned “opaque bars” of the same frequency. It was first proposed and demonstrated by the French painter G. A. Bois-Clair in 1692. As a viewer walked by his paintings, they would appear to change from one picture to another.
This explanation is published here : lenticular history
Some are calling this “lens-free”.
