Dab tsi yog qhov nyuaj ntawm cov suab paj nruag thiab nws cuam tshuam li cas rau cov nyhuv sib tsoo?

Qhov "Hardness" ntawm cov xuab zeb yog qhov kev ntsuas kev ua tau zoo. Nws tau txuas ncaj qha rau kom ruaj khov thiab ua kom tiav cov khoom abrasive yog nyob rau ntawm cov xuab zeb saum npoo av. Cov yeeb yam no tsis tsuas yog cuam tshuam ntev npaum li cas cov xuab zeb ntev tab sis kuj tseem txiav txim siab zoo li cas thiab qhov ua tau zoo ntawm txoj haujlwm sib tsoo hloov.
Sandpaper nrog cov hardness siab txhais tau tias nws cov abrasive ua kom muaj zog thiab tsis txhob tawm yooj yim. Qhov no hom ntawm cov xuab zeb yog qhov zoo ntawm kev hnav cov khoom siv nyuaj li hlau lossis tawv ntoo. Nws tuaj yeem tshem ntawm cov kab ntsig ntawm cov khoom saum npoo nrawm nrawm thiab ua kom cov kev sib tsoo ua kom zoo. Tab sis siab hardness kuj tseem yuav ua rau nws tsis zoo ntawm cov ntsiab lus daws tau, tshwj xeeb tshaj yog thaum nws los sib tsoo cov duab nyuaj. Nws yooj yim yuav raug txwv.
Ntawm qhov tod tes, cov xuab zeb nrog cov hardness qis yog qhov zoo vim tias nws yog muag heev thiab hloov tau. Cov khoom abrasive nyob rau hauv hom ntawm sandpan yog softer thiab haum cov khoom nyob saum npoo zoo dua. Nws yog qhov tshwj xeeb tshaj yog rau cov khoom muag muag lossis thaum koj xav tau kev sib tsoo zoo. Tsawg - hat hardness sandpaper tuaj yeem muab cov smoother thiab cov khoom sib tsoo ua tau zoo dua. Nyob rau tib lub sijhawm, nws tau yooj yim dua yooj yim ua rau nws yooj yim dua los lis cov duab nyuaj. Tab sis lub durability ntawm tsawg - hardness sandpaper tsis muaj zog, thiab koj yuav tau hloov nws ntau zaus.
Thaum koj xaiv cov xuab zeb, koj yuav tsum xav txog yam koj yuav tsum tau ua thiab cov yam ntxwv ntawm cov khoom. Sib txuam lub hardness ntawm cov suab paj nruag txoj cai nrog kev sib tsoo ua tsis tau tsuas yog ua rau txoj haujlwm mus nrawm dua tab sis kuj ua kom cov kev sib tsoo yog qhov zoo thiab koj tau txais txiaj ntsig zoo tshaj plaws.