Cling film and laser: what they have in common

1. Step 1. Cling film — is made of — Polyvinyl chloride (PVC). Cling film was made of PVC; now it is more often polyethylene.
2. Step 2. Polyvinyl chloride (PVC) — is material for — Payment card. The card is PVC.
3. Step 3. Payment card — has part — Security hologram. A hologram.
4. Step 4. Security hologram — is a kind of — Holography. A hologram.
5. Step 5. Holography — uses — Laser. Coherent light.

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