Heat glass to pliable stage, using gas flames or ovens and rotating glass to heat it uniformly.
Inspect, weigh, and measure products to verify conformance to specifications, using instruments such as micrometers, calipers, magnifiers, or rulers.
Record manufacturing information, such as quantities, sizes, or types of goods produced.
Place glass into dies or molds of presses and control presses to form products, such as glassware components or optical blanks.
Spray or swab molds with oil solutions to prevent adhesion of glass.
Blow tubing into specified shapes to prevent glass from collapsing, using compressed air or own breath, or blow and rotate gathers in molds or on boards to obtain final shapes.
Operate electric kilns that heat and mold glass sheets to the shape and curve of metal jigs.
Determine types and quantities of glass required to fabricate products.
Set up and adjust machine press stroke lengths and pressures and regulate oven temperatures, according to glass types to be processed.
Shape, bend, or join sections of glass, using paddles, pressing and flattening hand tools, or cork.