Oil Sample | B | R | Y | |
Control | 0 | 1.2 | 10.2 | |
Electrical heater | heated once | 0 | 1.6 | 10.6 |
heated twice | 0 | 1.8 | 11.5 | |
Laser-heating | heated once | 0.1 | 2.3 | 11.7 |
heated twice | 0.2 | 2.5 | 11.9 |