Umgubo weTalc yimveliso yemizi-mveliso. Yi-talc yeqela le-talc ye-magnesium silicate. Icandelo eliphambili yi-magnesium silicate yamanzi. Emva kokutyunyuzwa, iphathwa nge-hydrochloric acid, ihlanjwe ngamanzi ize yomiswe.
Umgubo weTalc uneempawu ezintle kakhulu zomzimba nezekhemikhali ezifana nokuthambisa, ukumelana nomlilo, ukumelana ne-asidi, ubushushu, indawo yokunyibilika ephezulu, ikhemikhali engasebenziyo, amandla okugquma alungileyo, ukuthamba, ukukhanya okuhle kunye nokufunxwa okunamandla.
Umgubo weTalc udla ngokusetyenziswa njengesizalisi seemveliso zeplastiki nezephepha, isizalisi serabha kunye nearhente yokulwa nokunamathela kwiimveliso zerabha, ipeyinti yodidi oluphezulu, njl.

I-Talc ineempawu ezintle kakhulu zomzimba nezekhemikhali ezifana nokuthambisa, ukunganamatheli, uncedo lokuhamba kwamanzi, ukumelana nomlilo, ukumelana ne-asidi, ukugquma, indawo yokunyibilika ephezulu, iimpawu zeekhemikhali ezingasebenziyo, amandla amahle okugquma, ukuthamba, ukukhanya okuhle, kunye nokufunxwa okunamandla. Ngenxa yesakhiwo sayo sekristale esineengqimba, i-talc ithambekele ekuqhekekeni ngokulula ibe ziingceba kunye nokuthambisa okukhethekileyo. Ukuba umxholo we-Fe2O3 uphezulu, uya kunciphisa ukugquma kwayo.