Glass blowing is learned with your hands, in a hot shop, one repeatable motion at a time. Employers hire two kinds of people: scientific/lampworking glassblowers who make lab glass and tubing from borosilicate on a torch, and hot-shop or production glassworkers who gather molten glass from a furnace. This roadmap gets you from your first safe torch session to making accurate, repeatable pieces, getting hired as a production or apprentice glassworker, and then moving toward scientific glassblowing or your own studio. Be patient: control of heat and rotation is the whole craft, and it comes with
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Stage 1 of 3 · about 12 weeks
Work safely at a torch or furnace and make simple, even shapes in glass tubing and rod by controlling heat and rotation.
Shop safety and glass types
Glass at 1,000+ degrees F, open flame, compressed gases and fine glass dust can injure you in a second. Every employer checks first that you are safe. Also, different glasses (soda-lime, borosilicate such as Pyrex or Simax, lead crystal) behave differently, and mixing them makes pieces crack later.
Heating glass evenly
Almost every task starts with heating glass to a pliable stage while rotating it so it heats uniformly. If you heat one side, the glass sags, thins or cracks. Even heat is the base of all later control.
Cutting, sealing and joining tubing
Production and lab work both require cutting tubing to length, sealing ends and joining sections. These are the core moves that every lab-glass job tests.
Blowing and shaping with breath or air
Blowing is how you keep glass from collapsing and how you open up a bulb. Light, steady pressure gives even walls; too much blows a hole.
Measuring and inspecting
Customers buy glass to a specification. You need to measure with calipers, micrometers and rulers, and spot stress, seeds and cords before they do.
Then 2 more stages (about 72 weeks in all) with lessons, drills, projects, 6 interview questions with strong answers and free resources.