The term 'cartridge contents' refers to the materials that are contained within a cartridge, which is a device used to store and dispense a variety of substances. The crossword solutions for this term are INK (3 letters), AMMO (4 letters), INKS (4 letters), TONER (5 letters), and TONEARM (7 letters). INK is a liquid or paste that contains pigments or dyes and is used for writing, drawing, or printing. AMMO is short for ammunition, which is a material fired, scattered, dropped, or detonated from a weapon. INKS are a type of liquid or paste that contain pigments or dyes and are used for writing, drawing, or printing. TONER is a powder mixture used in laser printers and photocopiers to form the printed text and images on the paper. Tonearm is an arm on a record player that holds the stylus and moves it across the record.