Hom I: Titanium dioxide yog ziab kom qhuav thiab tsis kho. Hom I titanium dioxide muaj qhov tsis tshua muaj thaj chaw thiab qhov nqus roj tsawg.
Hom II: Nws yog hom I titanium dioxide uas tau kho thiab ntub dej kom tshem tawm cov khoom loj thiab coated nrog 4% silicon-aluminium. Nws muaj thaj chaw qis tshaj plaws thiab qhov qis tshaj qhov nqus tau cov roj.
Chav Kawm III: Nws yog hom superfine txheej qib nrog cov organic txheej.
Qeb IV: Ntau txheej ntawm txheej txheej, tuaj yeem faib ua IVa thiab IVb, thiab cov txheej lo yog li ntawm 5-10%. B tsuas yog siv hauv kev tso tawm ntau ntawm titanium dioxide, vim tias nws cov opacity zoo dua Ⅳa.
