Abstract: A liner for mixing the sample gas and a carrier gas and delivering the gas mixture to the inlet end of a capillary tube of a gas chromatograph for analysis, comprises (a) a transparent tube having an inlet and an outlet and a bore with an inside surface, and (b) at least one glass subcomponent permanently affixed to the liner tube wherein the subcomponent is at least one color.

Abstract: A liner for mixing the sample gas and a carrier gas and delivering the gas mixture to the inlet end of a capillary tube of a gas chromatograph for analysis, comprises (a) a transparent tube having an inlet and an outlet and a bore with an inside surface, and (b) at least one glass subcomponent permanently affixed to the liner tube wherein the subcomponent is at least one color.

Abstract: A process for producing a cutting die having a metal base which carries a sharpened ridge extending along a predetermined path thereon, in which a supply of powdered metal and a laser beam are moved along the path so as to surface melt a thin layer of the metal base with the metal powder and thus form a band of fused metal powder along the path, this step being repeated to form additional layers metallurgically bonded to the base and to each other, until a ridge of metal is formed. The ridge is then sharpened to suit it for use in cutting. The ridge may have a top surface of harder material than the inner part of the ridge. The laser and powder delivery movements may be controlled by a CNC (computer numerical control) motion system. The invention includes novel dies produced by this process.