Resolve Immersion OilResolve Immersion Oil For use with Oil Immersion objectives Resolve immersion oil is a clear, colorless oil (refractive index: 1. 5150) that allows light transmission through most of the UV VIS spectrum. Manufactured using a proprietary process that removes interfering substances and results in oil that will not damage valuable optics or irreplaceable slides. Resolve contains no PCBs, eliminating toxicity and disposal problems. Low viscosity immersion