Parachute Reinforcement Disks - Single or Double? TIP

Most kit parachutes are around a 1 mil (1/1,000th of an inch) thick.
Polyethylene sheet parachutes can stretch and tear so reinforcement rings are needed.

Some kits include the cheaper paper rings. If you use a paper ring you should place a ring on the top and the bottom of the parachute corners.
Even doubled up, paper rings are not the best way to go.

Better yet, use a single poly vinyl ring.
You can pick them up at any office supply store.
These are Avery white Reinforcement Labels #5279.
Get the white labels, the clear rings can be hard to see on the backing strip.
One pack of 200 rings will make 33 six-sided parachutes, enough to last anybody for a while.

Without tearing it, how do you tell if a kit supplied rings are paper or plastic?
The poly vinyl rings have a shiny surface. Paper rings usually have a flat finish.