I ripped open the packet and clamped the absorbent pad against the soldier's head.

The test-principle involves a flow of fluid containing the analyte through a porous membrane and into an absorbent pad.

To reduce pile distortion, the absorbent pad should be kept well-lubricated with cleaning solution.

Some methods of testing involve collecting saliva using an absorbent pad, applying a chemical solution, and monitoring for color change to indicate a positive or negative result.

The acetone soaked into an absorbent pad next to a celluloid disk which held back a spring-loaded firing pin from a percussion cap connected to an adjacent detonator.