Celluloid billiard balls

Numéro d’image : 11618209
Celluloid billiard balls
Celluloid billiard balls. These balls were developed as an alternative to the traditional ivory balls,and were patented in 1869 by US inventor John Wesley Hyatt (1837-1920). Celluloid is a mixture of nitrocellulose and camphor. It is a thermoplastic,the first to be discovered,meaning it can be remelted and remoulded. Hyatt's work was based on the patent he acquired from the British inventor Alexander Parkes (1813-1890),who had named the plastic Parkesine in 1856. Celluloid became a popular replacement for ivory and wood before more stable and less flammable thermoplastics were discovered
Licence : Droits gérés
Crédit: Science Photo Library / Tobias, Gregory / Chemical Heritage Foundation
Taille de l’image : 4368 px × 2912 px
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Property Release : Non requis
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