Abstract: Spectacles comprising spectacle mounts (a bridge piece (15) and two side pieces (29)) affixed to two lenses (2), the spectacle mounts being affixed by means of pins (25, 31) which are inserted into appropriately positioned holes or slots (28) drilled into the lenses (2). A single hole or slot (28) in the lens (2) is required to allow the attachment of each mount (15, 29) by location with the appropriate pin (25, 31). The holes or slots (28) are sized to match the dimensions of the pin to give the pins (25, 31) a “close” fit, and the adhesive is specifically chosen to act as a buffer between the pins (25, 31) and the lens (2), thereby substantially reducing or even eliminating the pressure around the assembly point which produces stress marks in rimless spectacles constructed using known methods.

Abstract: Spectacles comprising spectacle mounts (a bridge piece (15) and two side pieces (29)) affixed to two lenses (2), the spectacle mounts being affixed by means of pins (25, 31) which are inserted into appropriately positioned holes or slots (28) drilled into the lenses (2). A single hole or slot (28) in the lens (2) is required to allow the attachment of each mount (15, 29) by location with the appropriate pin (25, 31). The holes or slots (28) are sized to match the dimensions of the pin to give the pins (25, 31) a “close” fit, and the adhesive is specifically chosen to act as a buffer between the pins (25, 31) and the lens (2), thereby substantially reducing or even eliminating the pressure around the assembly point which produces stress marks in rimless spectacles constructed using known methods.

Abstract: The invention is concerned with a change in the current practice of dyeing natural and synthetic polyamide materials with reactive dyestuffs. The invention involves pre-treating the material to be dyed with an amphoteric auxiliary in a bath which is brought rapidly to the later dyeing temperature and which contains an amphoteric auxiliary preferably at a pH buffered within a specific range. It is found that the pre-treated material takes on the reactive dyestuff very readily and that the dyed materials have a good fastness. A major achievement is that the dyeing time is cut to about one-half of that presently employed.