Page:Arts & Crafts Essays.djvu/128

 not look like anything but what it is. The effect of the work is obtained by the contrast of the rich colours of the pot-metal with the pearly tones of the clear glass.

We must now describe a painted window, so that the distinction between a coloured and a painted window may be clearly made out. Quoting from the same book as before—"To paint glass the artist uses a plate of translucent glass, and applies the design and colouring with vitrifiable colours. These colours, true enamels, are the product of metallic oxides combined with vitreous compounds called fluxes. Through the medium of these, assisted by a strong heat, the colouring matters are fixed upon the plate of glass." In the painted window we are invited to forget that glass is being used. Shadows are obtained by loading the surface with 104