changing bag

Noun

changing bag (plural changing bags)

1. (photography) A bag designed to protect unexposed film from light.
   • 1909, James Boniface Schriever, editor, Elementary Photography, American School of Art and Photography, page 196:

     Where no dark-room is at hand for loading plate holders or developing tank, the Ingento rubber changing bag will be found very convenient.

   • 1945, Bureau of Naval Personnel, Photography (Navy Training Courses)‎, volume 2, Washington, D. C.: Navy Department, page 382:

     In sand or dust storms, motion-picture cameras should be loaded in a loading or changing bag. Small 16-mm. cameras can be placed inside the bag before the camera door is opened. With some 35-mm. cameras, the bag can be stretched over the lens to provide some degree of protection even though it cannot be sealed tightly.

   • 1979, George L. Wakefield, edited by George L. Wakefield, Leonard Gaunt, Paul Petzold, The Pictorial Cyclopedia of Photography, Focal Press, →ISBN, page 34:

     A changing bag can be used for loading them into the tank, thus doing away with the necessity for a darkroom. The printing is best done when the expedition returns to base.

   • 2023, Ilisa Barbash, Lucien Taylor, Cross-Cultural Filmmaking: A Handbook for Making Documentary and Ethnographic Films and Videos, University of California Press, →ISBN, page 247:

     The standard 400-foot rolls (11 minutes at 24 fps) are generally loaded into "magazines" in a lightproof changing bag, so that they are ready to be attached to the camera as soon as you want to shoot.

2. (childcare, somewhat formal) Synonym of diaper bag.
   • 1989, Nina Grunfeld, Week by Week Guide to Your Pregnancy, Smithmark Publishers, →ISBN, page 71:

     [a list of supplies] Changing bag to carry nappy equipment around in.

   • 2007, Carol Cooper, Baby & Child: Your Questions Answered, DK Publishing, →ISBN, page 205:

     A potty (or change of diaper) is also a good idea. Take his changing bag, filled with the essentials (see below).

   • 2021, Jen Gale, The Sustainable(ish) Guide to Green Parenting: Guilt-free Eco-ideas for Raising Your Kids, Bloomsbury Publishing, →ISBN, page 53:

     In the same way that anything with the word 'wedding' in front of it automatically costs as least twice as much […] so does anything made specifically for new parents. I would urge you to resist anything overtly 'baby-ish' for your changing bag. Use a rucksack/bag you already have, or look for a good quality backpack with all the pockets (I do love a pocket).