Glass transparent colourless

Development and Production of Transparent Colourless and Tinted Glass Ceramics... 

The main volume properties of polymers are colour and transparency. Both may either be inherent to the polymer or caused by additions, e.g. dyes and other additives. Most polymers do not show differential absorption in visible light and are therefore colourless. The volume properties cover a wide range from glass clarity to full opaqueness. This is also the case for the surface properties they may vary from high gloss to full dullness (matt). 

It is a transparent and colourless gas, which has no action on glass at ordinary temperatures. The formula has been established by analysis and from the vapour density. The compound is decomposed by heat, giving sulphur and fluorides of phosphorus, thus —... 

The amorphous form is a colourless transparent glass (m 2 0 0") which is obtained when the vapour is slowly condensed below the vaporization temperature, and should be kept in a sealed tube because it changes to the octahedral form (m 275") in the presence of moisture. [Rushton Daniels J Am Chem Soc 48 384 1926.]... 

The reversible generation of colours or the reversible darkening with specially doped, colourless, transparent, inorganic glasses during irradiation with light is called photochromism. 

As thus obtained, it appears in the shape of a colourless and transparent glass, which slowly dissolves in water. It is hence called glacial phosphoric acid. Its solution causes in solutions of silver a white granular precipitate of monobasic phosphate of silver it also coa lates albumen. But if long kept, or if very rapidly boiled, this solution passes into one of tribasic phosphoric acid, and no longer precipitates silver or coagulates albumen. Here 2 eqs. of water enter into the composition of the acid P O HO + 2H0 = P,0 3H0. 

Many polymers in everyday use contain fillers and colouring agents that render them opaque. The optical properties of the base polymer are thus obscured. On the other hand the clarity of optical transmission of many polymers and the fact that they are almost colourless, coupled with their low density and excellent mechanical properties, are the reasons for their use to replace glass in many applications. In other applications glass would be totally inappropriate because of its greater brittleness. Other polymers, such as the ubiquitous polyethylene, are often colourless but translucent rather than transparent. 

The electrochromic electrode of these devices, which can work either in the reflective or transmissive mode, is constituted by a conductive, transparent glass coated with electrochromic material. The counterelectrode can be of any material that provides a reversible electrochemical reaction in devices operating in the reflective mode (like electrochromic displays) by contrast, in variable light transmission electrochromic devices (like electrochromic windows) it has to be either colourless in both oxidized and reduced states or electrochromic in a complementary mode to the... 

Low-expansion glass ceramics are widely used as precision parts (see Chap. 4), cooktop panels, stove windows, and cookware. In this section we will focus on the development of transparent glass ceramics used as stove windows (colourless) and cooktop panels (tinted) glass ceramics for cookware are also briefly discussed within this section. 

Make a dilate solution of purple coloured permai nate of potash and place it in a glass bottle. Surround it for some time with a mixture of carbonic acid snow and ether. On removing the bottle, it will be found that the solution has soliditied into a transparent block of clear, transparent, and perfectly colourless ice, with the exception of an intense coloured cylinder of permanganate of potash concentrated along the axis of the entire mass. 

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