Abstract: Oxidation-resistant, electrolessly deposited metal coatings, e.g. of copper, can be provided on a variety of substrates such as fibers and films. Precursor substrates have nascent or actual clusters of catalytic metal with dimensions less than 100 nanometers, e.g. about 10 nanometers. Disclosed methods can produce electrically conductive, copper-coated PET or acrylic multifilament with a resistance of less than 20 ohms/meter.

Abstract: A method of producing an optical recording medium according to the present invention includes the steps of forming a recording film on a transparent substrate, recording signals in the form of perforated pit rows on the recording film by a laser beam, and forming a reflection layer on the recording film on which the pit rows have been formed. The recording film is bleached after recording or the laser beam used for recording is selected to have a wavelength different from that of a laser beam used for reproducing so that the recording film is transparent to the laser beam used for reproducing.