Nciphisa i-calcium carbonate. Yenziwe ngekhwalithi ephezulu ye-calcium carbonate (i-limestone) njengezinto ezingavuthiwe It ngokusebenzisa i-calcine,
ukugaya, ukukhishwa kwekhabhoni, ukudilika, ukuhlunga, ukomisa nokuchoboza
Isici semikhiqizo ubumhlophe obuphakeme, ukukhanya okuphezulu, ukusatshalaliswa okufanayo kwezinhlayiya, okuncane
ukusatshalaliswa kobubanzi njll.