Colored erasers yog cov khoom siv sau ntawv feem ntau ua los ntawm roj hmab lossis lwm yam khoom siv tau yooj yim. Ntxiv nrog rau lawv qhov yooj yim erasing muaj nuj nqi, lawv muaj nyob rau hauv ib tug ntau yam ntawm cov xim thiab tsim, ua rau lawv visually txawv thiab yooj yim rau kev txheeb xyuas. Raws li cov khoom siv ntawv txuas ntxiv hloov mus rau ntau qhov kev ua haujlwm thiab tus kheej tsim, cov xim pleev xim tau raug siv ntau qhov chaw, suav nrog kev kawm, kev ua haujlwm hauv chaw ua haujlwm, kos duab, khoom siv tes ua thiab kev ua haujlwm txhua hnub.
Kev kawm ntawv tseem yog ib qho ntawm feem ntau siv rau cov xim erasers. Cov tub ntxhais kawm tuaj yeem siv lawv los tshem cov cwj mem, ua cov ntawv sau kom raug thiab kho cov duab kos lossis suav. Cov xim sib txawv tso cai rau cov neeg siv xaiv cov khoom raws li tus kheej nyiam thaum ntxiv ntau yam rau cov ntawv sau txhua hnub. Rau cov neeg siv yau, cov xim ci ntsa iab thiab cov qauv tsim ua si tuaj yeem ua rau cov ntawv sau zoo sib xws.
Hauv kev kos duab thiab tsim qauv, cov xim pleev xim tuaj yeem ua haujlwm pab txhawb lub luag haujlwm. Lawv tuaj yeem siv tsis tau tsuas yog los kho qhov yuam kev tab sis kuj tseem ua kom zoo dua qhov chaw me me ntawm kev kos duab thiab tsim cov teebmeem tshwj xeeb. Erasers nrog qib sib txawv ntawm hardness thiab cov yam ntxwv ntawm cov khoom sib txawv yuav haum rau ntau hom kev kos duab. Lawv cov xim kuj tseem tuaj yeem muab txoj hauv kev yooj yim rau cov kws kos duab thiab cov neeg tsim qauv kom paub qhov txawv ntawm ntau hom lwv.
Kev siv chaw ua haujlwm sawv cev rau lwm daim ntawv thov. Cov cwj mem, cov cuab yeej kos duab thiab lwm yam cuab yeej sau ntawv txuas ntxiv siv rau hauv ntau qhov chaw ua haujlwm. Cov xim pleev xim tuaj yeem siv los kho cov ntawv sau, kho cov ntawv sau thiab txhawb nqa cov haujlwm yooj yim kos duab. Lawv qhov loj me kuj ua rau lawv yooj yim khaws cia rau hauv cov ntawv xaum, cov rooj teeb tsa lossis cov thawv ntawv sau.
Cov tshuaj pleev xim xim kuj tuaj yeem muab tso rau hauv cov khoom siv tes ua thiab cov niam txiv -cov haujlwm me. Cov khoom uas muaj cov duab sib txawv thiab cov xim ci tuaj yeem siv los ua cov ntaub ntawv muaj tswv yim yooj yim rau kev kho kom zoo nkauj lossis sib sau ua haujlwm ua haujlwm. Hauv cov menyuam yaus cov kev ua ub no, cov xim sib txawv kuj tseem siv tau rau kev txheeb xyuas thiab xim -kev paub txog kev ua haujlwm.
Raws li kev tsim cov ntawv sau txuas ntxiv txhim kho, cov xim pleev xim tau dhau los ua ntau yam ntawm cov ntaub ntawv, hardness, cov duab thiab cov duab pom. Cov neeg tsim khoom tuaj yeem kho cov qauv tsim khoom thiab cov qauv tsim khoom kom tau raws li qhov nyiam thiab cov kev xav tau ntawm cov neeg siv sib txawv.
Zuag qhia tag nrho, cov xim pleev xim tuaj yeem yog cov khoom siv me me, tab sis lawv cov ntawv thov txuas dhau qhov kev kho qhov yuam kev yooj yim. Los ntawm kev ua haujlwm hauv tsev kawm ntawv thiab chaw ua haujlwm mus rau kev kos duab, khoom siv tes ua thiab kev sib tham sib, lawv ntau yam xim thiab cov qauv siv tau yooj yim muab cov neeg siv ntau txoj kev xaiv rau kev siv cov ntawv sau txhua hnub.
