A hard to beach oil, with known ffa and color is treated with various dosages of Super Golden Earth under standard vacuum, temperature, contact time and stirring. The colors are measured in Lovibond Tintometer and the results are compared with standard earth results.

Measurement of residual free acid content as well as pH value of water solution filtered out of the Bleaching Earth are routine test with titration method as well as pH meter and stringent standards are maintained for the same. Company Standard: Acidity as free HCL less than 0.1% And pH with 10% water suspension between 3.5 – 4.5.

Moisture content is measured in a standard laboratory – drying chamber as well as by Karl-Flasher- titration. According to the Company Standard moisture contents remain between 8 – 12%.

We have a standard, exhaustive, test method for determining the filtration properties of our bleaching earth. We filter oil under standard conditions of temperature and pressure difference over an oil-wet-filter-cake. Stringent standards are followed and maintained to ensure fast filtration rate of Super Golden Earth. Company Standard: Filtration rate at 110 Centigrade 3 –5 ml/minute.

This is a supplementary test carried out in conjunction with filtration test. It depends on activation and particle size of Bleaching Earth and is maintained at the minimum levels. According to the Company Standard Oil retention remain between 18 – 25%.