Abstract: A method for manufacturing a glass container by the steps of (a) providing a plunger with two portions, one portion having a sprayed metal coating of self-fluxing alloy and the second portion having a ceramic coating, (b) forming a lubrication carbon layer on surfaces of molds including a blank mold and a neck ring by periodically injecting flames of at least one kind of gaseous hydrocarbon having a carbon to hydrogen ratio more than 0.75, (c) supplying a gobbet of glass to the blank mold; (d) producing the parison from the gobbet of glass, using the plunger, the blank mold and the neck ring; and (e) blow-forming the parison to a glass container of a final configuration.

Abstract: Method and device for reducing NO.sub.x content in the waste gas generated in a glass melting furnace of side firing or end firing type equipped with a heat recovering device, comprising supplying hydrocarbons in a counter flow to that of the waste gas by combustion, or from the corners of the combustion chamber into the combustion chamber over the melt tank.