Kerosene dopes

The oil phase, Soltrol 130, a refined kerosene, was doped with iodated oils of similar molecular structure. The dopants are strong photoelectric absorbers and increase the accuracy of saturation determination by increasing the X-ray attenuation. The refined, nearly single-component, oil was also used to insure complete first-contact miscibility. Because this is a single-component oil, multiple contact developed miscibility is not observed below the miscibility pressure. 

The relative efficiency of a number of antiknock dopes in suppressing knocking of a kerosene is shown by Table XXVII. 

However doping the bitumen with a light oil as a solvent (often kerosene, or creosote), known as cutback can render the bitmac workable at lower temperatures. 

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