Entry No. 20 — the San Francisco file — filed under: glassblowing
Public Glass
San Francisco's only public-access glassblowing studio, a nonprofit hot shop tucked into an industrial stretch of the Bayview where total beginners are handed a blowpipe and 2,000-degree molten glass under one-on-one instruction.
The story
San Francisco isn't exactly overflowing with open-flame industrial workshops anymore, but tucked into an unassuming warehouse block on Armstrong Avenue in Bayview, Public Glass has been keeping a 2,000-degree furnace burning since 1996. It stands as the city's only public-access hot shop—a nonprofit facility operating in a neighborhood historically shaped by heavy industry, keeping the complex tradition of glassblowing open to anyone willing to step up to the bench.
Rather than watching a craftsman work behind safety barriers, you are handed a heavy steel blowpipe and brought directly to the crucible. Shaping molten silica here relies on old-school thermal physics and deceptively low-tech tools: wet newspaper pads squeezed directly in your gloved hand to steam-form incandescent glass, steel jacks to crimp necks, and graphite paddles to flatten bases before the piece goes into the annealer to cool.
What it's like
You'll step off a quiet industrial street in Bayview straight into a workspace filled with the constant roar of ventilation hoods and radiant furnace heat. Instructors move fast and keep tight safety protocols, guiding your hands as you gather glowing glass, roll it on the steel marver, and reheat it in the glory hole. Wear cotton clothing and closed-toe shoes—synthetics will melt near the furnace heat. Note that because hot glass shatters if cooled too quickly, whatever you make goes straight into a slow-cooling annealing kiln overnight, so you'll return a day or two later to pick up your finished paperweight or ornament.
The move: Take the 3-hour 'Play With Fire' hot glass intro side by side — gather molten glass on the pipe, shape it with wet newspaper pads and jacks, and each leave with a paperweight or ornament you personally blew.
- 📍 Bayview/Hunters Point, San Francisco
- 💸 $$
- ⚡ Up for anything
- 🌗 Indoors
Where: 1750 Armstrong Ave, San Francisco, CA 94124
Hours: Added 2026-07-20 — confirm current hours before you go.
⚠ Seasonal or scheduled — always check before you go.
Pair it with
- Archimedes Banya — Keep the intense heat theme going by heading just over a mile north to sweat it out at Bayview's waterfront Russian bathhouse.
- Pier 90 Grain Silos — Explore more of Bayview's industrial shoreline by checking out the towering 1923 concrete grain terminal just up the road.
- Paxton Gate — Drive into the Mission after your class to pick up natural oddities and glass display domes that mirror your new handmade creation.
Good to know
Do you get to take your glass creation home the same day?
No. Glass requires hours of controlled slow cooling inside an annealing oven to prevent thermal shock and cracking, so you will need to return to the studio later to collect your piece.
What should you wear to a workshop?
Wear non-synthetic natural fibers like 100% cotton, along with full-coverage closed-toe shoes. Synthetic materials like polyester can warp or melt when exposed to intense radiant heat.
Do I need prior experience to take a class?
Not at all. Introductory sessions like 'Play With Fire' are tailored for absolute beginners, providing hands-on instruction covering glass gathering, tool work, and pipe rotation.
Is Public Glass a commercial business or a community space?
It operates as a 501(c)(3) nonprofit center, offering public classes, youth arts initiatives, and rental studio access for local independent glass artists.
Plan a visit & invite your people →
Further reading: Official site · kqed.org
last checked: 2026-07-20