1. Transparency necessary unnecessary glasses mirror Rocker room window
blind
lens

2. What is transparency
Trasparency is the physical property of allowing light to pass through the material without being scattered.
Transparency
Translucency
Opacity
반투명:When looking through an object, it has the property that the opposite side is blurred
불투명:when lookin through an object, light does not pass and does not shine.

3. Transparency ~ Opacity
Glass
Plastic
Vinyl
Acrylic
Translucence
PVC
Paper
Stainless
Rubber
Opacity