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.
Cut lengths of tubing to specified sizes, using files or cutting wheels.
Develop sketches of glass products into blueprint specifications, applying knowledge of glass technology and glass blowing.
Inspect, weigh, and measure products to verify conformance to specifications, using instruments such as micrometers, calipers, magnifiers, or rulers.
Measure dimensions of completed products or workpieces to verify conformance to specifications.