Paper Industry – Precipitated Calcium Carbonate

Lime is widely known as a very essential raw material for the paper industry. Quicklime and slaked lime is used in the paper industry as a bleaching and purifying agent for cellulose pulp, obtained by grinding wood. Precipitated Calcium Carbonate in paper increases the quality of the paper and helps regulate its color, texture and brightness, while providing significantly higher levels of whiteness and opacity than those obtained by using non-synthetic fillers such as Natural Carbonate (CC).

Lime in the form of Calcium Oxide is used as an integral part of the pulp manufacturing process as a regenerating agent for the reagents used.

Precipitated calcium carbonate is the chemical compound with the formula CaCO3, obtained by the precipitation of calcium in the form of carbonate. It has less impurities, more brightness and controlled morphology, having chemical composition higher than 99% of CaCO3.

Precipitated Calcium Carbonate on paper (CALPREC PA) is used as a filler, increasing the volume and porosity of the paper, while providing significantly higher levels of whiteness and opacity than those obtained by using non-synthetic fillers such as Natural Carbonate (CC).

Thanks to the above mentioned characteristics, CALPREC PA is especially recommended for low grammage papers requiring opacity.