SLAKED LIME PARTICLES, LIGHT CALCIUM CARBONATE, PAPER AND COATED PAPER USING SAME, AND METHOD FOR PRODUCING LIGHT CALCIUM CARBONATE

摘要

Slaked lime particles which show, in the percentage volume particle size distribution, a cumulative volume of particles of 1.0 µm or less in particle size of 20% or lower and a cumulative volume of particles of 100 µm or less in particle size of 95% or higher. In a process for obtaining said slaked lime particles, it is preferred that slaking water is added to quick lime and mixed therewith at a molar ratio (slaking water/quick lime) of 2.5 or lower. These slaked lime particles are slurried. Then, the resultant slaked lime slurry at 20-70°C is carbonated by blowing a carbon dioxide-containing gas thereinto to give light calcium carbonate. The light calcium carbonate thus obtained can be used as a filler for papers or a pigment for coated papers.