Abstract: A glass panel has a transparent or semitransparent colored film in which fine particles of gold having an average diameter of 10 nm or less are dispersed, the colored film being formed partly or wholly on a surface of a glass panel. The colored film is produced by coating a paste containing a composite material with the fine particles of gold dispersed in a polymeric material, preferably a paste containing a material for suppressing growth of fine particles of gold, on the surface of the glass panel, and heating the glass panel to bake a colored film with the fine particles of gold dispersed therein to the glass panel.

Abstract: The present invention relates to the multi-splindle machining apparatus which carries out machining of the discontinuous surfaces of a plurality of workpieces simultaneously, and in order to restrain the amplification of chattering, oscillation or the like so as to prevent the machining precision from deterioration, the diameters of plural drive pulleys 7a, 7b, 7c connected to a driving motor are finely varied to change at random the rotational speeds which are transmitted from the drive pulleys 7a, 7b, 7c through belts 10 to driven pulleys 8 provided on each machining spindle 3a, thus changing irregularly the timings at which cutting edges 9 of the machining spindles 3a pass the discontinuities such as joint portions s.