Qaybta ugu weyn ee talc waa magnesium silicate oo leh biyo ku jira talc, qaacidada molecular-kuna waa mg3 [si4o10] (OH) 2. Talc waxay ka tirsan tahay nidaamka monoclinic. Kilaasku waa mid isku mid ah oo hexagonal ah ama rhombic ah, mararka qaarkoodna waa la arkaa. Badanaa waa isku-dhafan yihiin, waaweyn yihiin, caleen u eg, radial iyo fibrous isku-dhafan. Waa mid aan midab lahayn, hufan ama caddaan ah, laakiin waa cagaar khafiif ah, jaalle ah, bunni ah ama xitaa casaan khafiif ah sababtoo ah xaddi yar oo wasakh ah; dusha sare ee kala-goysku waa dhalaal luul ah. Adkaanta 1, cuf-isjiidadka gaarka ah 2.7-2.8.

Sifo
Budada Talcum waxay leedahay sifooyin jireed iyo kiimiko oo heer sare ah, sida saliidaynta, iska caabbinta dabka, iska caabbinta aashitada, dahaarka, barta dhalaalka sare, dhaqdhaqaaq la'aanta kiimikada, awoodda daboolida wanaagsan, jilicsanaanta, dhalaalka wanaagsan, nuugista xooggan, iwm. Sababtoo ah qaab-dhismeedka kiristaalka ee talc waa lakab, waxay u janjeertaa inay u kala baxdo miisaanno iyo saliid gaar ah.

Qeexitaanka budada talcum
200mesh, 325mesh, 600mesh, 800mesh, 1250mesh, 2000mesh, 5000mesh, iyo 8000mesh.
Caddaan: laga bilaabo 85% ilaa 96%

Codsiga
1. Darajada dahaarka: waxaa loo isticmaalaa midab cad iyo dhammaan noocyada dahaarka warshadaha ee ku salaysan biyaha, saliidda, rinjiga ilaalinta, iwm.
2. Darajada warqadda: waxaa loo isticmaalaa buuxinta dhammaan noocyada warqadda iyo looxa warqadda, wakiilka xakamaynta laamiga alwaaxa.
3. Heerka balaastikada: waxaa loo isticmaalaa buuxinta polypropylene, nayloon, PVC, polyethylene, polystyrene, polyester iyo balaastikada kale.
4. Darajada caagga: waxaa loo isticmaalaa buuxinta caagga iyo alaabada caagga ah.
5. Heerka fiilada: waxaa loo isticmaalaa waxyaabaha lagu daro fiilada iyo wakiilka go'doominta fiilada.
6. Heerka dhoobada: waxaa loo isticmaalaa in lagu sameeyo dhoobada korontada ku shaqeysa, dhoobada korontada ku shaqeysa ee bilaa-waayirka ah, dhoobada warshadaha kala duwan, dhoobada dhismaha, dhoobada maalinlaha ah iyo dhalaalka, iwm.
7. Heerka walxaha biyaha celiya: waxaa loo isticmaalaa duubka biyaha celiya, dahaarka biyaha celiya, cadarka biyaha celiya, iwm.
8. Budada talcum ee fiican: waxaa loo isticmaalaa dahaarka rinjiga ee heerka sare ah, balaastikada, cinjirka fiilada, qurxinta, dahaarka warqadda naxaasta ah, saliidaynta dharka, iwm.