The Origins of "Scotch"
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“Scotch” as a brand name for 3M tapes is believed to have its origins in a disgruntled auto-body painter who was using the new 3M masking tape. It was not sticking properly because it was not entirely coated with adhesive backing. He told a salesman to take the tape back to his “stingy Scotch bosses” and use more adhesive.
The story may be embellished, but the masking tape was improved and “Scotch” was soon put into use as a brand name.
The two billionth roll of “Scotch” masking tape was produced in 1957, 30 years after it went into mass production.
Files

Scotch Brand Tartan Logo
In 1945, the company adopted the red, green, and yellow plaid pattern for packaging, based on the Wallace clan tartan, with the advice of New York color consultant Arthur Allen. | Source: Minnesota Historical Society
Masking Tape Applied to Car
Masking tape was developed in 1925 to meet a need in the automobile industry to aid in painting car finishes. | Source: Minnesota Historical Society
Cellophane Tape
The two billionth roll of “Scotch” masking tape was produced in 1957, 30 years after it went into mass production. | Source: Minnesota Historical Center
Cellophane Tape
The two billionth roll of “Scotch” masking tape was produced in 1957, 30 years after it went into mass production. | Source: Minnesota Historical Society
Scottie McTape
Scottie, the mascot figure, began to appear in company advertising in 1946. | Source: Minnesota Historical Society
Scotch Tape "Good News" Ad
An ad highlighting extra large rolls of Scotch tape for commercial use. | Source: Minnesota Historical Society