P17.7
Foam Test — Ross-Miles Foam Height
Procedure 7 of 40 · Chapter 17 · §17.2.2
1 table 0 notes
Table 1
| Surfactant Type | Initial Foam (mm) | Foam Stability Index FSI (%) | Typical Range |
|---|---|---|---|
| Sodium lauryl sulfate (SLS, reference) | 180–220 | ≥85 | Benchmark standard |
| SLES (2 EO) | 160–200 | ≥80 | Slightly lower than SLS |
| LAS (neutralized) | 140–180 | ≥75 | Good detergency foam |
| AOS (C₁₄-C₁₆) | 150–190 | ≥80 | Stable foam |
| AEO-9 (nonionic) | 80–120 | ≥60 | Lower foaming |
| NP-10 (nonionic) | 70–110 | ≥55 | Moderate foam, lower stability |
| Fatty acid soap | 120–160 | ≥70 | Hard water sensitive |