Once boiled, a yellow layer is formed - this is scraped off leaving absolutely pure salt.

The color of the frog is caused by blue and green pigments covered in a yellow layer.

With a deeper incision, the surgeon cut through the yellow layer of subcutaneous fat, and slit into the peritoneum.

A dye-sub printer has to pull each print through four times - one pass each for the yellow, red, blue and lamination layers.

The ground, like the blackened tree-trunks, was covered with a thick yellow layer of pollen.

Brown, white, yellow and beige layers are combined in a serious-looking dress.

Small white teeth probed the yellow first layer.

A yellow layer of subcu appeared and then she hit muscle.

A yellow layer was added on the blue side through means of imbibition.

The outer brown layer gives the common variety of the dye, the lower yellow layer the refined variety.