Dab tsi yog qhov txawv ntawm ntub erase pesters thiab chalk cim?

Ntub dej so thiab chalk yog ob txoj kev sib txawv. Lawv cov tub ntxhais sib txawv sib piv dag lawv cov ntawv sau, tshaj tawm cov txheej txheem, erasure txoj kev, thiab kev siv cov xwm txheej siv. Lawv sib txawv tshwj xeeb hauv kev huv si, yooj yim thiab ib puag ncig kev yoog raws. Ib qho kev sib txawv ntshiab tuaj yeem tsim nyob hauv tsib qhov tseem ceeb:
I. Cov ntsiab lus txhais thiab sau cov ntsiab cai
Cov ntaub ntub dej ntub tau paub tias yog "kua hauv cov cwj mem." Lawv muaj dej - raws lossis cov number case tshwj xeeb. Qhov ntxeev ntawm tus cwj mem (nyuaj lossis muag) tso cov kua mem ntshav (xws li txha hniav laus, iav thiab nplooj whatboards). Lwv cov cim yuav tsum muaj daim ntaub ntub lossis daim txhuam cev, tsis yog ib lub lwv. Number case ib zaug qhuav, muaj zog adhesion, tsis yooj yim kom tau muab tshem tawm kom yuam kev.
Chalk tau suav hais tias yog "daim chalk." Nws lub ntsiab lus tseemceeb yog calcium carbonate, calcium sulfate. Cov hmoov nplaum rau cov npoo av, xws li cov blackboard, los ntawm kev sib txhuam ntawm tus cwj mem thiab saum npoo, tsim lub cim. Lineing cov cim yuav ua tau ncaj qha nrog ib daim ntawv qhuav, tab sis chalk plua plav tuaj yeem tsim thaum so thiab tuaj yeem yooj yim los yog muab cov khib nyiab yooj yim. ii. Kev sib piv ntawm qhov sib txawv tseem ceeb (rooj qhia pom qhov sib txawv tseem ceeb)
Kev sib piv qhov ntev: ntub {{{}} ltease pens vs. chalk pens
Haum substrates: du, tsis -} {}, du yas ntoo (tsoos tsho me me, matte board, Marae phab ntsa)
Lwv txoj kev: so nrog daim ntaub ntub dej / daim txhuam cev. Qhuav so yuav tsis ua haujlwm. Tsis muaj hmoov seem. So ncaj qha nrog daim ntaub pua plag qhuav yuav tsim kom muaj ntau tus lej chalk plua av, yooj yim los tsim cov hmoov zoo.
Kev kawm sau ntawv: du ntsis flow, pom meej yooj yim, cov xim ci (feem ntau hauv cov xim), plua plav {} pub dawb. Sau ntawv tseev kom muaj kev siv zog ntau dua (cia siab rau kev sib txhuam kom tso hmoov), uas tuaj yeem ua rau muaj kev cuam tshuam thiab monochrome (feem ntau dawb / xim chalk). Chalk stains tes yooj yim.
Kev tshuaj ntxuav huv thiab kev tiv thaiv ib puag ncig: tsis muaj hmoov av, so nrog daim ntaub qhuav kom qhuav lub substrate yuav ua tau. Yooj yim los ntxuav thiab haum rau plua plav - ib puag ncig. Cov kab mob chalk cov plua plav tuaj yeem ua rau ua pa tawm, cov plag tsev tsis huv / plag tsev, yuav tsum tau tu tu, thiab yog tu cov nqi.
Qhov ruaj khov: pens tuaj yeem kav ntev ntev (kom txog thaum koj khiav tawm hauv mem kua), thiab cov lus qhia tsis hnav yooj yim, tab sis tuaj yeem tawg yooj yim (tshwj xeeb yog tias koj sau tawv). Chalk tuaj yeem sau dhau qhov kev ncua deb thiab txo qis.
III. Qhov sib txawv loj hauv kev thov cov xwm txheej
1. Cov apps tseem ceeb rau ntub - le} ltase pens
Hmoov av -} dawb ib puag ncig: Eg KEN TIRGARTEN chav kawm, los tiv thaiv cov menyuam yaus los ntawm cov khoom siv plua plob) thiab chaw kho mob (kom ib puag ncig huv).
Ntev -} kev khaws cia: Cov ntawv sau qhia tau yooj yim los ntawm kev sib tsoo (kev sau ntawv hauv tsev yog pom tau yooj yim dua thiab yooj yim dua los ntxuav).
Dawg substrates: piv txwv li, iav qhov rai thiab pob tshab yam tsis muaj cim), ntxiv rau cov chaw ntub dej
2. Cov ntawv thov tseem ceeb ntawm Chalk Cess: Piv txwv li Kev Qhia Ntawv Black Ceg Kev ntxhib cov txheej txheem yuav tsum muaj: Piv txwv, sab nraum zoov daim Blackboards thiab cov phab ntsa Graffiti (cia siab rau cov hmoov nplej uas ntub tsis tuaj yeem tso cov ntaub ntub dej).
Tsawg - Tus nqi daws teeb meem: Rau cov cim tsawg dua (txhua daim chalk yog pheej yig dua, nrog lub sijhawm siv tsawg dua, thiab tsis tas yuav txhawj xeeb txog kev siv dej num tsis tau).
IV. Taw qhia Ntsiab Kev txiav txim siab nyob rau hauv kev ua tiav
Xav txog ib puag ncig: yog tias "plua plav - pa, tsev kho mob thiab chaw soj nam), nws yog qhov zoo tshaj plaws los siv tus cwj mem ntub dej. Yog tias koj siv cov pa luam yeeb ib txwm thiab muaj kev siv nyiaj tsawg, xaiv chalk.
Xav txog hom ntawm substrate: du substrates (xws li iav thiab ntub {{le} lwv cov ntaub so ntub) tsuas yog siv cov ntaub so ntub; ntxhib substrates (xws li tsoos chalkboards) tsuas yog siv nrog chalk vim cov ntaub so ntub tsis lo rau cov chaw ntxhib.
Xav txog zaus zaus: rau qhov ntev {{{}}} - Cov Lus Qhia Txhua Hnub), Xaiv rau cov xim ntub (ruaj khov thiab yooj yim thiab ntxuav). Rau ib ntus, qis {{- zaus sau (xws li kev siv hluav taws xob tsawg dua thiab cov kab sab nraud), xaiv rau chalk (tus nqi qis). Hauv ntej, ntub dej so lub cim yog qhov kev tu thawj thiab yooj yim "hmoov av"; Chalk yog thawj qhov qis - tus nqi "cov cuab yeej ib txwm muaj" rau cov cab. Nws tsis muaj kev ncaj ncees lossis tsis zoo. Qhov tseem ceeb yog xaiv raws li ib puag ncig thiab kev xav tau ntawm kev siv.