[s4e4] Windmill Acetone Celluloid Firing Pin -

: An early plastic made from nitrocellulose and camphor. It is famously highly flammable and was the standard material for motion picture film until the mid-20th century.

: This typically denotes Season 4, Episode 4 of a television series. Given the mechanical nature of the other words, it is often associated with shows like MacGyver or MythBusters , where improvised tools are central to the plot. [S4E4] Windmill Acetone Celluloid Firing Pin

is used to soften or partially dissolve Celluloid (like old film or guitar picks). : An early plastic made from nitrocellulose and camphor

The softened material is molded or used as a volatile fuel source. [S4E4] Windmill Acetone Celluloid Firing Pin

: A powerful solvent commonly used to dissolve plastics or clean metal parts.