
This building has had many lives, but originally it was a glass factory.
Jefferson Glass was a major producer of blown and pressed glass in Ontario.
9
Location:
400 Carlaw Avenue
Jefferson Glass Company
Year:
1912
Architect:
Various
Made:
Blown and pressed glass, light bulbs, light shades, and illuminated signs

Industrial Canada

Image by Susan Drysdale
At its peak it made about 35,000 light bulbs a day on this site.
Business thrived when Jefferson made glass products for the military during the First World War. However, when peace returned, many unionized workers found themselves unemployed.
Living Memory
“I am a returned soldier … I had just started work this morning [at Jefferson] when the manager came to me and said I would have to quit as the union men objected because I was not a member [of their particular union].”
Private J. W. Tyson
Speaking to The Toronto Star,
January 4, 1919
Union History
Unions started to organize more efficiently.
One of the longest labour disruptions was in the fall and winter of 1954–1955, when about 120 members of the United Electrical Workers union went on strike.
For five months, they fought for a wage increase and additional funding for health, welfare, and other benefits.
The Acme Paper Box Company bought the Jefferson factory in 1931 and operated here for several decades.
The Acme Paper Box Company bought the Jefferson factory

Its owner was a Jewish businessman and philanthropist Moishe (Moses) Oelbaum.
The company added many new buildings to the Jefferson factory, resulting in the current architectural mishmash. Acme remained a family business until 1964 when it was sold to a conglomerate and the plant became a paper mill.
Fast Fact
“Acme”
For many, the name Acme will be forever associated with the Looney Tunes cartoon Wile E. Coyote and the Road Runner. At the time the cartoon was first produced, Acme was a common company name, literally meaning “the highest point.” The dubious quality of the products supplied by the cartoon Acme Corporation have, unfortunately, somewhat sullied the word.
The 1960s brought disruption to the neighbourhood.
Disruption in the 1960s
The design of the Carlaw factories could not support the latest production lines and new laws regulated pollution from heavy industries.
Companies began to relocate to the suburbs and there were many closures and layoffs. These triggered large protests calling for regulation of plant closures, which eventually became law.
The typical multi-storey factory made extensive use of chutes and specialized rooms. New production lines were often open plan, located within in a single large indoor space.
Living Memory
“When the factories closed, it left an economic vacuum in the area. But vacuums tend to get filled and some far-reaching entrepreneurs bought these buildings and cut out spaces, then rented them.”
City planner Paul Winterton
speaking to The Toronto Star,
August 23, 1999
Acme moved away in the 1980s and this factory fell into disuse.
The building was later refurbished and now houses many light industries and small businesses.

Check it out…
Read the plaque

View the text transcription
Jefferson Glass Company Factory
Later Acme Paper Box Company
A major producer of Ontario blown and pressed glass opened here in the early 1910s. The Jefferson Glass Co. specialized in light shades and illuminated signs and by 1918 it was also making about 35,000 light bulbs a day.
The Acme Paper Box Co., founded by Moishe (Moses) Oelbaum, bought the Jefferson factory in 1931. Born in Galicia in Eastern Europe, Oelbaum was a philanthropist who donated to many causes and helped establish several Jewish schools in Toronto. Acme remained a family business until 1964 when it was sold to a conglomerate and the plant became a paper mill.
After the mill moved away in the 1980s, the factory fell into disuse. The area’s multi-floor industrial buildings could not accommodate the latest production lines and new laws regulated pollution from heavy industries.
The building was later refurbished and now houses many light industries and small businesses.

Next stop:
Toronto Hydro


Ready to hit the next stop?
Continue north on Carlaw Avenue until just before the bridge.
From here you can see the Toronto Hydro Building on the east side of Carlaw Avenue. Stay on the west side of Carlaw Avenue for a better view.









