text: Synchronized swimmers often use this substance in a process called "knoxing."
full_question: Synchronized swimmers often use this substance in a process called "knoxing." A "10% ballistic" formula of this material is used to simulate the effects of bullet wounds. Richard Leach Maddox invented a photographic process in which silver salts are suspended in it. A dichromated form of this material is often used in holography. This material is commonly used to give shape to (*) marshmallows, and substitutes for it include pectin and carageenan. It is produced from the hydrolysis of collagen, and its main sources include pig skins and cow hides. For 10 points, name this wobbly, translucent material used to make aspics and Jell-O.
first_sentence: Synchronized swimmers often use this substance in a process called "knoxing."
raw_answer: gelatine