Low-priced stock that sells at less than $1.00 per share. Often highly-speculative and volatile, such as start-up mining companies. While, in general, penny stock are considered high-risk securities, some penny stock mature into less-speculative investments. All penny stock are traded over-the-counter.
In its natural form, cork is also a very good fire retardant, although cork dust is actually extremely flammable (because here the cell structure has been broken down). Impermeable: Cork has a magic chemical in its cell membrane that makes it completely impermeable to liquids and gases.
CR117 is a fine grain composition cork material available in sheets. This sheet cork is suitable for bulletin board, coaster, silk screening or gasket applications. Linocork is a fine grained cork roll material with natural linseed oil and rosin binder secured to natural jute backing.