Abstract: A process is provided for producing a polymeric layer having a desired image thereon or a three dimensional article comprising a number of such layers in which a layer of a liquid photocurable composition which comprises photo colourable particles is cured by light and selected areas thereof are irradiated with light of a different dose, thereby forming the desired image which composition comprises particles dispersed in it which are micro-capsules containing a photosensitive colour changing composition within a barrier layer which is substantially impermeable to the components of the colour changing composition or are solid particles comprising an immobilised photosensitive colour changing composition. The process permits the use of the same initiating mechanism to cure the resin and to change the colour of the particles.

Abstract: A process is provided for producing a polymeric layer having a desired image thereon or a three dimensional article comprising a number of such layers in which a layer of a liquid photocurable composition which comprises photo colorable particles is cured by light and selected areas thereof are irradiated with light of a different dose, thereby forming the desired image which composition comprises particles dispersed in it which are micro-capsules containing a photosensitive color changing composition within a barrier layer which is substantially impermeable to the components of the color changing composition or are solid particles comprising an immobilized photosensitive color changing composition. The process permits the use of the same initiating mechanism to cure the resin and to change the color of the particles.

Abstract: A method for making a mold including the steps of (a) forming a layer of a photocurable composition containing a U.V. transparent filler; (b) irradiating the layer formed in step (a) with light in a predetermined pattern thereby forming a solid cross-sectional layer of the desired mold; and (c) repeating steps (a) and (b) on the previously formed solid cross-sectional layer until the mold is formed. The filler is preferably phyllosilicate clay mineral and the mold has heat and pressure shock resistant properties making it particularly useful for injection molding.

Abstract: An electrochemical cell having an anode and a cathode separated by a diaphragm wherein the diaphragm comprises a porous polymeric material containing units derived from tetrafluoroethylene, said material having a microstructure characterized by nodes interconnected by fibrils.

Abstract: A metal phosphate coating is applied to a glass article. A liquid composition containing at least in part an organic component and a metal compound having a metal with an atomic number of 12, 14, 20-32, 39-50, 56-80, 90 or 92 and an oxyacid of phosphorus is applied to the glass article. The liquid composition is converted to the metal phosphate coating, i.e., by air drying and/or heating, to give a coating of 0.01 to 5 microns thickness and being transparent to visible light but ultra-violet absorbing.

Abstract: A process for providing an abrasion resistant coating on the surface of a glass container by treating the container with a solution containing 0.5 to 10% by weight of phosphoric acid and less than 5% by weight of metal phosphate in an aqueous diluent, the temperature of the surface of the container being at least 300.degree. C, and thereafter applying a lubricious organic cold-end coating to the surface of the container.

Abstract: An organic polymer article has a surface coating of a metal phosphate. The coating has a thickness in the range of 0.01 to 5 microns; preferably, the metal phosphate comprises a mixture of iron and titanium orthophosphate, although the metal may be chosen from the elements of a periodic table having an atomic number of 12, 14, 20 to 32, 39 to 50, 56 to 80, 90 or 92. A continuous coating of the metal phosphate is obtained by applying to the organic polymer article a solution of a compound of the metal wherein the solution contains an organic component. The solution is converted to the coating of the metal phosphate by drying.