Abstract: The electric lamp has an information-displaying external coating (3) which is provided on the lamp envelope. The coating (3) comprises a metal oxide as the pigment, which is dispersed in a polysiloxane matrix which may contain lithium. The coating (3) is obtained by using a marking ink, which may be applied by means of an ink jet printing process.

Abstract: A method of selectively metallising an inner, electrically insulating surface S.sub.i of an open body (3), comprising the following steps:(a) providing a roller (2) having a resilient outer surface S.sub.o ;(b) providing a layer of a suitable wet ink on the surface S.sub.o, according to a given pattern;(c) causing the roller (2) to roll along the surface S.sub.i so as to impart a patterned layer of wet ink from the surface S.sub.o to the surface S.sub.i ;(d) allowing the patterned layer of wet ink imparted to the surface S.sub.i to dry;(e) selectively depositing metallic material upon the patterned layer of dry ink thus obtained.Such a method is particularly suited to the manufacture of a scan velocity modulator (1) for use in a cathode ray tube.

Abstract: The method serves for the electroless deposition of a metal layer (7) from a metallization liquid on a top side of a flat article to be metallized, more in particular a flat disc, for example, a master disc (1) which is used for the reproduction of optical discs. According to the method the top side of the article is first made hydrophilic, if so necessary, after which, with the article supported in a horizontal position, a quantity of metallization liquid is provided on the top side which was previously made hydrophilic as a stable liquid layer (16) bounded by the edges of the article, after which the deposition of the metal from the liquid on the article takes place and the liquid layer is the removed entirely from the surface.

Abstract: Method of producing a metal matrix for the manufacture of optically readable information carriers, in which a photoresist layer which contains an information track and is provided on a carrier is coated with an electroless gold layer, the gold layer at the side provided with the resist layer being exclusively in contact with organic material, the gold layer being provided with a first metal peel by electro-deposition, the carrier coated with the resist layer is removed, the gold layer-coated first metal peel provided by electro-deposition at the side having the gold layer with a second metal peel, the first metal peel being removed together with the gold layer and optionally a further metal copy of the second metal peel is produced by electro-deposition.

Abstract: A method of manufacturing a metal matrix which is suitable for the production of synthetic resin information disks, in which a master disk consisting of a glass supporting plate (1) and a photoresist layer (2) comprising an information track is coated with an electroless Ni-layer (6) and an electrodeposited Ni-layer (7). A matrix having an excellent surface quality is obtained by a pre-treatment of the master disk with a detergent and an aminosilane.

Abstract: Optically readable information disc having a substrate plate manufactured by an injection moulding process or a compression moulding process and composed of a mixture of 40-90% by weight of polymethylmethacrylate and 10-60% by weight of polyvinylchloride or chlorinated polyvinylchloride.

Abstract: A method for wet metallizing articles made, or having a surface to be metallized, of an acrylic polymer containing at least 0.01 percent of acrylamide, methacrylamide, or of an acrylate ester or amide of an alkanol or alkyl amine have a terminal basic nitrogen group, e.g., an amino, substituted amino, or basic nitrogen heterocyclic group.

Abstract: A method of providing a metal mirror on polycarbonate in which the surface of polycarbonate is pretreated with an aminosilane, preceded by a corona discharge and/or succeeded by a treatment with tannin.

Abstract: Optical fibres consisting of a synthetic resin at least on their outer circumference are continuously provided with a metal coating by electroplating. For this purpose the synthetic resin coating is made electrically conductive, for example, by continuous electroless metallization.

Abstract: Method of manufacturing an article of synthetic resin which has an electroless provided metal layer in which a mixture of monomeric acrylates and an N-substituted pyrrolidon compound is polymerized, the resulting article is treated with an aromic carboxylic acid substituted with one or more hydroxy groups and/or an amino group, or derivatives thereof, and a metal layer is then provided on the thus treated article by electroless deposition.

Abstract: Optionally readable information disk in which the information track is situated in a radiation-cured lacquer layer comprising at least 50% by weight of a diacrylate, triacrylate or a mixture thereof and which the cured lacquer layer has a high indentation hardness.

Abstract: An optically readable information disk which comprises a transparent substrate plate (1) of PVC or a copolymer of vinyl chloride which is provided on one side with a reflecting optical structure (2-5) and on the other side with a radiation-cured lacquer layer (6) which is transparent to the laser light (7) used.