925 gumhpraw ngu ai gaw gumhpraw 92.5% lawm ai gumhpraw mawn sumli ai hpe tsun mayu ai. Aten ladaw ni na wa ai hte maren, oxidize byin wa nna, nsin sin wa chye ai raitim, hpaji ninghkring ni a san seng ai ladat ni hte, shi a nsam hpe loi loi hte bai gram lajang lu na re.
1. Nta hpe asan sha san seng hkra galaw ai ladat:
Hka hte hka n-gun loi mi hpe n-gun n rawng ai nba langai mi hta bang nna gumhpraw mawn sumli ai hpe loi loi hte chya ya u. San seng ai hka hte atsawm sha kashin kau nna hkyet mat hkra galaw u. Shing nrai, baking soda hte hka hpe bang nna, n-gup hka shin ai brush hte shim lum ai hku kashin kau u. Ndai ladat lahkawng gaw, kaji kajaw oxidization galaw na matu ram sai.
2. Hpaji ninghkring ni a san seng ai ladat:
Gumhpraw hpe jasan jaseng ai tsi (sh) gumhpraw hpe jasan jaseng ai hpun palawng ni hpe hpaga lam hta lu mai ai, dai ni gaw grai kaja ai hte grai htuk manu ai mawn sumli ai arai ni hpe jasan jaseng na matu grau htuk manu ai. Raitim, n-gun n rawng hkra, hka shin ai tsi hpe lawan lang na matu sadi ra ai.
3. Oxidation hpe ninghkap ai hpaji jaw ga ni:
N bu hpun ai shaloi, mawn sumli ai arai ni hpe pat da ai shingkyit hta bang da u. Manam pyaw ai baw hte hka shin ai tsi ni hte matut mahkai ai lam hpe koi ga. Gumhpraw hpraw ai nba hte ayan jasan jaseng u. Dai hpe bu hpun nga ai aten hta hkum hkrang sau ni hte matut mahkai na matu ahkang jaw ai gaw, teng sha n san seng ai lam hpe shayawm ya lu ai.
