S-Core Vietnam Joint Stock Company, headquartered in Vietnam, is a mining, trading and exporting unit of aluminum ore limestone . We would like to introduce the following products and ingredients: Chemical composition & Test results limestone SiO2 0,01% Fe203 0,029% AL2O3 0,008% MgO 0,10% CaCO3 99,46% pH 7,9% Whiteness 86,9% (Oil Absorption) 20% Thank you very much for taking the time to read this recomendation letter!