Upfu hweTalc chigadzirwa chemuindasitiri. I talc yeboka re magnesium silicate mineral. Chinhu chikuru i aqueous magnesium silicate. Mushure mekupwanywa, inorapwa ne hydrochloric acid, yogezwa nemvura yoomeswa.
Upfu hweTalc hune hunhu hwakanaka hwemuviri nemakemikari zvakaita sekunyorovesa, kuramba moto, kuramba acid, kudzivirira kupisa, kunyunguduka kwakanyanya, makemikari asingashande, simba rakanaka rekufukidza, kupfava, kupenya kwakanaka uye kunyunguduka kwakasimba.
Upfu hweTalc hunowanzo shandiswa sekuzadza zvigadzirwa zvepurasitiki nemapepa, kuzadza rabha uye semushonga unodzivirira kunamira zvigadzirwa zverabha, pendi yepamusoro-soro, nezvimwewo.

Talc ine hunhu hwakanaka hwemuviri nemakemikari akadai sekunyorovesa, kudzivirira kunamira, kubatsira pakuyerera kwemvura, kuramba moto, kuramba acid, kudzivirira kunyunguduka kwemvura, kunyunguduka kwemvura kwakanyanya, hunhu hwemakemikari husina basa, simba rakanaka rekufukidza, kupfava, kupenya kwakanaka, uye kunyunguduka kwakasimba. Nekuda kwechimiro chayo chekristaro chakaiswa muzvikamu, talc ine tsika yekupatsanurwa nyore nyore kuita zviyero uye kunyorovesa kwakakosha. Kana zviri muFe2O3 zvakakwirira, zvinoderedza kunyorovesa kwayo.