Shell(Cone shell)
3.A cone-shaped, fossilized internal shell of any of an extinct genus of cephalopods related to the cuttlefish.
5.Intumescent microcapsule flame retardants were synthesized by encapsulating red phosphorus within the m-phenyleneisophthalamide (PMIA) resin shell through reaction dipping under the condition of SC-CO_2. Their physical properties and fire retardant properties have been investigated by using Scanning Electronic Microscopy (SEM), Themogravimetry-differential Thermal Analysis (TG-DTA), Elemental Analysis, CONE, etc. Synthesizing PMIA using SC-CO_2 has never been reported as yet.

