Re: [Zennie] Cleaning Your Rig Revisited
Soap, detergent, whatever, breaks the surface tension of water allowing it to soak into the fabric and helps release the dirt from the fibers. Agitation will assist to "shake" the dirt away from the fibers and allow it too be rinsed away. Agitating a parachute in water is a bad Idea.
Lets talk about calendaring. When the f-111 fabric is woven together, the strands are still round. (use any piece of thread as an example or a rope for an exaggerated example) Calendaring is the process of smashing the strands flat using heated rollers. Smashing the threads flat will reduce the permeability of the fabric. As the canopy ages, the threads will slowly round out a little from the shock of the canopy opening and spreading out the weave. Packing and crumpling a canopy has some affect as well.
Dunking a parachute into water will increase the permeability. It soaks into the strands and just like a sponge it will swell. As it dries the threads are no longer smashed flat. Parachutes can take a water landing fairly well as many BASE jumpers have come to realize.
Adding the Woolite… which as stated earlier breaks the surface tension of water, will increase the amount of water the strands can soak in therefore, rounding the threads out even more … which will increase the permeability.
As it dries, the fabric and load tapes can shrink at different rates causing the canopy to be slightly distorted from original.