Silk and aerosol can: what they have in common

1. Step 1. Silk — works like — Nylon. Nylon was created as a substitute for silk.
2. Step 2. Nylon — is a kind of — Polymer. A polyamide.
3. Step 3. Polymer — is material for — Hair spray. The hairstyle is held by the polymer film left once the solvent evaporates.
4. Step 4. Hair spray — uses — Aerosol can. Hair spray comes out of an aerosol can as fine droplets, so it settles as an even film.

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