Table 3 List of method evaluation parameters and rating criteria
| Â | Rating of 1 | Rating of 2 | Rating of 3 | Rating of 4 | Rating of 5 |
|---|---|---|---|---|---|
Independent evaluation parameters | |||||
 Visibility | Totally obstructed | Greatly reduced by more opaque material | Moderately reduced by translucent material | Sightly reduced, or momentarily obstructed in a limited area | Completely visible |
 Process complexity  (number of steps needed to test, prepare, apply, remove, and clear a varnish removal method) | Most steps (9 or more) | 7–8 | 5–6 | 3–4 | Fewest steps (1–2) |
 Initial cost (in EUR) | Most expensive (> 25.00) | 16.01–25.00 | 9.01–16.00 | 4.00–9.00 | Least expensive (< 4.00) |
 Health and safety measures | Rating of 2–4 + containment and fire prevention measures | Rating of 3–4 + PPE | Rating of 4 + ventilation measures | Standard laboratory practice only | No prevention measures required |
Mock-up-dependent evaluation parameters | |||||
 Time (to optimal cleaning result) | Slowest (> 6 min) | 5–6 min | 3–4 min | 1–2 min | Fastest (< 1 min) |
 Mechanical action  (degree applied to optimal cleaning result) | Significant action to solubilise varnish | Moderate action to remove varnish + minor action to clear cleaning system | Moderate action to remove already solubilised varnish | Minor action to clear cleaning system | None |
 Pigment pickup* | Most pigment pickup (> 15) | 12–15 | 8–11 | 4–7 | Least pigment pickup (< 4) |