Bfg Glassgroup

B.r.i.c.-bureau De Recherche Pour L' Innovation Et La Convergence &

Jacques Duchateau

Maurice Nicolas

Philippe Gravisse

Maurice Perron

Christien Van Den Bossche

The present invention relates to the authentication of fiduciary or security objects, such as official documents, contracts, banknotes, credit cards and computer diskettes. The object to be authenticated is marked with a matrix composed of an organic resin of the vinyl or acrylic type, or any other similar resin, incorporating a series of sparkling doping materials and a series of photoluminescent doping materials with long-lasting remanence. This marking is carried out by coating, transfer of a film, printing, or integration of particles into the fiduciary material. The document marked in this manner can, in addition, be covered with a substance which is transparent in the visible spectrum going from UV to IR with the exception of a given wavelength band. The object marked in accordance with the invention has a first color in daylight, a second color when it is submitted to ultraviolet radiation and a third color from long-lasting when it is placed in darkness.

Fiduciary or security object enabling visual or optical authentification

A method of manufacturing a mirror which comprises the steps of selecting a former of shape complementary to the shape of the desired mirror surface, applying to such former a plurality of mirror elements each constituted by a glass element having a reflective coating on one face thereof, and applying and adhesively bonding directly to such mirror elements a preformed, substantially rigid, unitary structural support.

Method of manufacturing mirrors and mirrors so obtained

A composition of matter for use as a vitreous fertilizer comprising a soluble vitreous constituent comprising the following ingredients: 35 to 55 moles %, P.sub.2 O.sub.5 ; less than 10 moles %, K.sub.2 O; and the balance to 100 moles %, CaO and/or MgO. The balance of the composition, if any, is constituted by optional additions of nutrient proportions of one or more micro-nutrients in plant assimilable form, and/or optional additions of one or more plant-inert filler materials. Such compositions have favorable nutrient release rates. The invention also encompasses compositions of matter adapted for use as a plant fertilizer which comprises soluble vitreous plant nutrient release material in expanded or cellular form, and to methods of plant cultivation using such compositions.

Vitreous fertilizer compositions

A solar panel comprising at least one solar energy transducer laminated between a transparent vitreous sheet and a second sheet in which the transducer is imbedded in a layer of transparent polymeric material which bonds the sheets together. The polymeric material comprises an acrylic compound. A method of making the aforesaid solar panel in which the acrylic compound is allowed to set in situ is described.

Growing community of inventors

Recquignies, France

Jacques Duchateau