Vacuum bag
The first stage of a dry vacuum's filtration, not just a container for what it picks up.
In detail
In a dry vacuum the bag is not merely a container. Conservation guidance describes the machine as a series of stages: large pieces are caught in the bag, and air continues to blow through the bag carrying small particles that are then caught in additional filters. The bag is part of the filtration system rather than an accessory to it.
Why
- Vacuum bag is explained by Clogging the thing that does the work
Sources for this page
Sources
Conserve O Gram 1/6: Choosing a Museum Vacuum Cleaner
National Park Service, US Department of the Interior, 2003 · Government or regulator
Relied on for: That dry vacuums have stages of bags and filters, that large pieces are caught in the bag while air continues through it carrying small particles caught in additional filters. (states this directly)