Final answer:
The blue tinted film base introduced in 1924 was nitrate film, which is a type of celluloid made from nitrocellulose.
Step-by-step explanation:
The film base that had a blue tint introduced in 1924 is known as nitrate film. This film was essentially celluloid, made from nitrocellulose and often camphor, with added dyes and agents.
Celluloid film was widely used in the movie and photography industries before the adoption of the less flammable acetate safety film in the 1950s.
Celluloid has been cultivated for various uses, including its original application in billiard balls in the 1870s, which helped to establish it as the first thermoplastic.