You searched for: “most translucent
translucent (adjective), more translucent, most translucent
Letting bright elements pass through but diffusing them so that objects on the other side cannot be clearly distinguished: The door of the shower was made of translucent glass, letting shining images transmit through it, but not allowing clearly visible forms to be seen of who might be taking a shower!

Frosted glass is an example of another translucent product.