Opaquen

It consists of a circular disc of vulcanite, about three inches in diameter, around the margin of which there are ten pieces of opaquened glass, the opacities being graduated from No. 1, which is mere cloudiness, to perfect opacity, only admitting distinction between light and dark.

The next largest demand is for delustering and opaquening in the paper industry.

As the evolving shrift opaquens the workspace, I consider the duplicate.

(2004) Raman and scanning electron microscopy and energy-dispersive x-ray techniques for the characterization of colouring and opaquening agents in Roman mosaic glass tesserae.