Light passes through the top layer of glass to the black plastic layer underneath.

This plastic layer is a series of connected troughs that separate the water as it evaporates and trickles down through the levels.

Sometimes a blue plastic layer can be detected between the rocks.

The ink forms a very thin and smooth plastic layer on the paper surface.

These type of gloves could be home made with just a thick plastic layer, and a glove.

The ability of the plastic layer to stop projectiles is directly proportional to its thickness.

The original version had white and black plastic layers.

A good example is bulletproof glass, where a plastic layer stuck to glass make it many times stronger than either material would be separately.

The packing consists of a synthetic foam rubber blanket and a hard plastic top layer.

The plastic layer(s) added for protection vary in composition, thickness, color and texture according to the application.