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You can assess recovered solvent quality on the factory floor without laboratory testing. Here are 4 simple tests.
Test 1: Visual Colour Check
Clean solvent is colourless or slightly yellow and transparent. Brown or cloudy appearance indicates contamination. Transfer to a glass container and hold to light.
Test 2: Odour Check
Clean solvent retains its characteristic odour. Burnt or plastic smell indicates degraded contaminants — run a second distillation cycle.
💡 'Clean' is relative: purity for pre-paint degreasing differs from solvent thinning.
Test 3: Evaporation Test
Drop a few drops on white paper. After full evaporation, no stain should remain. Oily or coloured staining means contaminants remain.
Test 4: Application Test
Trial the solvent at small scale for its intended use. Test on a small batch or sample part.
Conclusion
These four tests provide sufficient quality assurance for most applications.
✅ AR-series machines deliver 97–99% purity in laboratory tests.