Table 1.
Phantom characteristics
| Phantom | Notation | Ingredient | |
|---|---|---|---|
| 1 | Soft | SS | Super soft plastic, 3:1 Softener |
| 2 | ↓ | S | Super soft plastic |
| 3 | ↓ | R | Regular plastic |
| 4 | ↓ | H | Regular plastic, 4:1 Hardener |
| 5 | Hard | HH | Regular plastic, 2:1 Hardener |
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