A professional who performs any combination of following duties to relieve other workers in producing gelatin or glue from animal stock (skins, splits, fleshings, and trimmings). Respnsibilities include:

• Tends equipment to wash animal stock used to make gelatin and glue and lime vats to loosen hair and open pores of stock.
• Tends equipment to cook stock for broth, and operates evaporator to dehydrate broth to concentrate gelatin contents.
• Tends press to filter impurities from gelatin or glue.
• Tends equipment to spread gelatin or glue into sheets for drying and equipment that grinds, weighs, and packages gelatin or glue.