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Metallic gold, in very small concentrations (around 0.001%, or 10 ppm), produces a rich ruby-colored glass ("Ruby Gold" or "Rubino Oro"), while lower concentrations produces a less intense red, often marketed as "cranberry". The color is caused by the size and dispersion of gold particles. Ruby gold glass is usually made of lead glass with ...
Cobalt glass—known as "smalt" when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt. Cobalt is a very intense colouring agent and very little is required to show a noticeable amount of colour.
The processes of chemical coloring of metals are as old as metalworking technology. Some of the earliest-known examples of colored metal objects are about 5,000 years old. They are bronze casts with some silver-colored parts, which originate from the Anatolian region. [2] Similar processes can be found on some ancient Egyptian copper sheets. [3]
Dyed in the wool or dyed in the fleece refers to fibers that are dyed prior to spinning. Compare to dyed in the hank or yarn-dyed; piece-dyed (dyed after weaving); and garment-dyed, dyed after sewing or knitting. dyer's broom Dyer's broom (Genista tinctoria), also known as dyer's greenweed or dyer's greenwood, is a garden plant used to produce ...
Unlike window film, privacy glass is a pigment within the glass that is installed during the manufacturing process. There is no way to remove the tint from the glass except to replace the glass with untinted glass. The only alternative to getting the same benefits of window film is to install window film over the factory tint.
Glass fiber (or glass fibre) is a material consisting of numerous extremely fine fibers of glass. Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the invention of finer machine tooling.
Optical filtering was first done with liquid-filled, glass-walled cells; [citation needed] they are still used for special purposes. The widest range of color-selection is now available as colored-film filters, originally made from animal gelatin but now usually a thermoplastic such as acetate, acrylic, polycarbonate, or polyester depending upon the application.
The Papyrus Graecus Holmiensis (also known as the Stockholm papyrus) is a collection of craft recipes compiled in Egypt c. 300 AD. It is written in Greek. The Stockholm papyrus has 154 recipes for dyeing, coloring gemstones, cleaning (purifying) pearls, and imitation gold and silver. [1] Certain of them may derive from the Pseudo-Democritus.