Dye and centrifugal pump: what they have in common

1. Step 1. Dye — is used in — Nail polish. Pigments and dyes give the polish its colour.
2. Step 2. Nail polish — is made of — Cellulose. The film is formed by nitrocellulose: cellulose treated with nitric acid.
3. Step 3. Cellulose — is material for — Cellophane. Cellulose.
4. Step 4. Cellophane — is material for — Haemodialysis machine. Kolff’s membrane was a cellophane tube.
5. Step 5. Haemodialysis machine — has part — Centrifugal pump. A blood pump (peristaltic).

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