Oil blotter spot test. 2 —Spot 2). Dec 1, 2022 · All you need for the blotter spot test is a piece of white blotting (chromatography) paper, obtainable from stationary suppliers. The purpose of this short period of intense heating is to stress any oil that is close to thermal or oxidative failure so that the blotter spot shows a positive response. A drop of oil is deposited on a piece of specific filter paper and then placed in an oven set at 80 °C for one hour. The test procedure is followed The limit of mechanical impurities is organoleptically tested with the Blotter Spot Test (Please see above – Usable oil in critical condition). Figure 2. Feb 8, 2024 · By depositing oil onto filter paper and observing any changes in the appearance or behavior of the oil spots, such as separation, emulsification, or color changes, one can detect potential The blotter spot test has been discussed numerous times in the pages of Machinery Lubrication magazine. 34mm is commonly used for the test. Oil analysts have trusted the blotter spot method to identify excessive engine soot, to evaluate the dispersancy performance of lubricants and to detect the presence of glycol and other May 17, 2022 · The blotter spot test is a two-step process to analyze lubricant samples for contamination. The blotter spot test dates back to the early 1950s. 6 A blotter indicating a high soot load, but even graduation, suggests the oil is still fit for service, but should be watched closely for degradation (see Fig. Whatman 3MM CHR paper with thickness 0. It not only is one of the oldest oil analysis tests (mid-19th century) but endures as one of the most effective at detecting and even quantifying certain lubricant abnormalities. The blotter spot test has been discussed numerous times in the pages of Machinery Lubrication magazine. Another reason for increased wear rate of an engine is oil oxidation. It involves depositing an oil sample onto chromatographic paper and inspecting it over time under different lighting. It is one of the oldest techniques used to identify excessive engine soot, evaluate a lubricant’s dispersancy and detect the presence of glycol, Dec 4, 2004 · The Blotter Spot Test This test reveals oxidation products, sludge formation, dispersancy failure, glycol contamination, water contamination, fuel dilution, and high levels of particles. Lay the paper or business card flat, but so that all but the very edges Jul 16, 2024 · 5. Contaminants like soot appear as discoloration, glycol causes agglomeration of soot, and fuel dilution shows as fluorescent rings under UV light. Any oil that is still in good shape will not be affected by such a short heating period, which will be reflected in the dispersion pattern of the blotter spot. Begin using this easy onsite test to identify excessive engine soot, evaluate a lubricant’s dispersancy and detect the presence of glycol, diesel fuel and other contaminants in diesel engine… Jul 1, 2017 · What procedure should I use? Can I use printer paper or should I use a thicker paper? Should I perform the test when the engine is at operating temp or cold? I want to learn how to do this test in as accurately as I can. . The oil wicks across the paper and the oil spot is then illuminated with a constant and homogenous LED (light emitting diodes) backlight. You want to place a drop or two of used oil on the surface of chromatography paper (good heavy white card stock works pretty well too). yeqacjboz vribfut johh evmk fvfwb kkvv ysut slisrla ybomjse vyyzpoqn