| 1. | Inspect, weigh, and measure products to verify conformance to specifications, using instruments such as micrometers, calipers, magnifiers, and rulers. |
| 2. | Record manufacturing information such as quantities, sizes, and types of goods produced. |
| 3. | Heat glass to pliable stage, using gas flames or ovens, and rotating glass to heat it uniformly. |
| 4. | 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. |
| 5. | Set up and adjust machine press stroke lengths and pressures, and regulate oven temperatures according to glass types to be processed. |
| 6. | Shape, bend, or join sections of glass, using paddles, pressing and flattening hand tools, or cork. |
| 7. | Dip ends of blowpipes into molten glass to collect gobs on pipe heads, or cut gobs from molten glass, using shears. |
| 8. | Develop sketches of glass products into blueprint specifications, applying knowledge of glass technology and glass blowing. |
| 9. | Determine types and quantities of glass required to fabricate products. |
| 10. | Place rubber hoses on ends of tubing, and charge tubing with gas. |
| 11. | Superimpose bent tubing on asbestos patterns to ensure accuracy. |
| 12. | Place electrodes in tube ends and heat them with glass burners to fuse them into place. |
| 13. | Operate electric kilns that heat glass sheets and molds to the shape and curve of metal jigs. |
| 14. | Strike necks of finished articles to separate articles from blowpipes. |
| 15. | Spray or swab molds with oil solutions to prevent adhesion of glass. |
| 16. | Cut lengths of tubing to specified sizes, using files or cutting wheels. |
| 17. | Place glass into dies or molds of presses, and control presses to form products such as glassware components or optical blanks. |
| 18. | Design and create glass objects, using blowpipes and artisans' hand tools and equipment. |
| 19. | Repair broken scrolls by replacing them with new sections of tubing. |
| 20. | Operate and maintain finishing machines to grind, drill, sand, bevel, decorate, wash, and/or polish glass or glass products. |