The degradation products that make up varnish can exist in the oil in either a dissolved or suspended state depending upon its chemistry and temperature. Eliminating varnish requires that you continually remove these deposits in both physical states. ESP media selectively separates and removes the oil’s bad components (degradation by-products) and leaves behind the oil’s valuable components (additive systems). The degradation products are bonded to the media, removing the risk of soft contaminant leaching. Soft contaminant leaching is common with other varnish removal technologies and can occur with temperature fluctuations in the fluid.