Density ntawm whatman ntawv thiab lwm hom ntawv

2024 Tus sau: Priscilla Miln | [email protected]. Kawg hloov kho: 2024-02-18 01:57

Qhov ntom ntawm daim ntawv whatman lossis ntawv luam ntawv tseem ceeb heev. Cov txheej txheem no txiav txim siab lawv cov peev txheej, luam ntawv zoo thiab txawm tias lub tshuab luam ntawv kav ntev. Dab tsi yog qhov ceev ntawm ntau hom ntawv, thiab yuav ua li cas xaiv qhov zoo rau ib hom haujlwm?

Qhov tuab thiab tuab tsis yog tib yam

Hais txog qhov ntom ntom, ntau tus neeg txhais tau tias daim ntawv tuab, tab sis qhov no tsis yog. Ib daim ntawv tuab ntawm ib hom ntawv zoo li tuab dua li lwm qhov, thaum lawv qhov hnyav yuav zoo ib yam.

Qhov tseeb, cov ntawv tuab yog xoob thiab ntxeem tau, hnav tawm sai dua, thiab muaj lub neej luv dua. Whereas nyias nrog ib tug siab ceev yog ntau compressed thiab yuav kav ntev dua. Thiab tus number case lays rau nws ntau tus sib npaug, uas yog tus yuam sij kom meej, zoo luam ntawv. Yog li ntawd, daim ntawv nyias yuav tsis yog ib txwm phem.

Daim ntawv twg siv qhov twg?

Nyob rau hauv ntau qhov chaw, daim ntawv sib txawv yog siv. Piv txwv li, luam ntawv yuav tsum tau ntsuas los ntawm 60 mus rau 300 g / m ². Daim duab no tsawg dua rau cov ntawv xov xwm - tsuas yog 45-60 g/m^{2. Daim ntawv kos duab lossis ntawv xim dej, ntawv rau cov ntawv thiab daim npav ua lag luam - tag nrho cov no yog qee yam ntau yam nrog qhov tshwj xeeb ntom ntom, cov txheej txheem rau kev tswj hwm nruj. Thiab daim ntawv whatman txawm muaj cov cim qhia meej sau tseg hauv GOST.}

Hais txog daim ntawv whatman, nws tsim nyog sau cia tias qhov no yog cov ntawv loj tshaj plaws uas siv hauv kev tsim thiab kos duab. Nws nrov heev ntawm cov neeg ntawm ntau txoj haujlwm.

Print ceev thiab zoo

Daim ntawv hnyav thiab lub tshuab luam ntawv tshwj xeeb muaj feem cuam tshuam zoo. Hauv cov lus qhia rau txhua lub tshuab luam ntawv, cov chaw tsim khoom feem ntau qhia txog hom ntawv thiab pom zoo kom ceev. Kos A4, 64-163 g/m2, piv txwv li, txhais tau hais tias daim ntawv tshwj xeeb no haum rau cov cuab yeej no. Daim ntawv Whatman nrog qhov ntom ntom ntau dua li qhov tso cai yuav tsis ua haujlwm - nws tuaj yeem ua rau lub tshuab ua kom puas thiab ua rau lub tshuab luam ntawv tsis zoo.

Raws li txoj cai, cov tshuab luam ntawv hauv chaw ua haujlwm thiab tshuab luam ntawv siv A3 thiab A4 daim ntawv, nrog qhov hnyav nruab nrab ntawm 80 g / m 2. Nws yog cov cim qhia tias cov tuam txhab tsim khoom raug coj los ntawm thaum tso cov ntawv luam tawm. Txhua tus ntawm lawv tsim nws tus kheej hom, nrog rau kev lees paub ntawm kev luam ntawv zoo ntawm daim ntawv ntawm hom no. Piv txwv li, cov khoom ntawm domestic hom Snegurochka yog nrov heev nyob rau hauv peb lub chaw ua hauj lwm.

Daim ntawv hnyav thiab GOST ntsuas

Yog paub qhov ceev, ces qhov hnyav ntawm ib daim ntawv kuj yooj yim los txiav txim. Piv txwv li, ib daim ntawv A4 nrog cov lej ntawm 80 g / m pob2 yuav hnyav yuav luag 5 grams. Nyob rau hauv ib tug txheej txheem ream ntawm xws li ntawv500 nplooj ntawv, uas txhais tau hais tias qhov hnyav ntawm pob yuav yog li 2.5 kilograms. Yog tias qhov tseeb qhov hnyav tshaj li daim duab no, feem ntau yuav tsis pom qhov chaw cia khoom, thiab cov dej noo ntawm daim ntawv yog siab tshaj qhov qauv.

Daim ntawv rau chaw ua haujlwm luam ntawv, phau ntawv thiab lub taub hau ntawv, nrog qhov ceev ntawm 160 g / m² yuav muaj tus nqi ntawm 800 txog 900 kg ib cubic meter. Tsawg dua 160 - los ntawm 750 txog 850 kg / m³ Ntxiv rau cov ntawv offset, daim ntawv whatman kuj tseem nrov. GOST teeb tsa qhov ceev rau nws ntawm qib 850-950 kg / m³. Cov ntawv xov xwm muaj qhov ceev tshaj plaws - nws kuj yog qhov pheej yig tshaj plaws. Lub sij hawm ntawm nws "lub neej" tsuas yog ob peb hnub, tom qab ntawd cov chaw tsim khoom tsis tuaj yeem lav hnav tsis kam: cov ntawv no pib tawg thiab tig daj.

Nyob ntawm cov haujlwm luam ntawv, daim ntawv hnyav, tawv tawv, thiab tuab yuav txawv. Txog rau tam sim no, muaj cov qauv sib txawv, thiab nws yuav tsis yooj yim los xaiv tag nrho cov qauv ntawm tus kheej.

Whatman - hwm ntawv

Qhov ntom ntawm Whatman daim ntawv yog siab dua lwm hom ntawv, yog li nws suav tias yog cov khoom lag luam thawj zaug. Muaj ntau ntau hom qauv: los ntawm A1 mus rau A4 (koj tuaj yeem nrhiav tau A5 hom ntawv), txhua tus ntawm lawv muaj nws qhov ntom ntom - txij li 120 txog 200 g / m². Thiab tseem muaj A0 daim ntawv nrog cov ntawv nthuav dav ntawm 841x1189 cm. Daim ntawv Whatman no yuav loj dua qhov loj dua li lwm hom ntawv ua ke.

Ntxiv rau qhov ntsuas qhov hnyav thiab qhov hnyav ntawm daim ntawv dab tsi, qhov sib xws ntawm daim ntawv loj kuj tseem ceeb, uas txhim kho kev luam ntawv zoo. Thiab lub siab opacity ntawm daim ntawv tso caisau los yog kos rau ntawm ob sab ntawm nws.

Yuav ua li cas txiav txim siab tias koj muaj daim ntawv kos duab zoo tiag tiag? Ua ntej ntawm tag nrho cov, nyob rau hauv tsos: daim ntawv no yog dawb, ntom thiab du. Yog tias tsis ntseeg, muab qee cov dej huv rau ntawm nplooj. Los ntawm nws daim ntawv kos duab yuav tsum tsis txhob deformed. Nws yog qhov no uas yog siv tsis tau tsuas yog rau kev kos duab, tab sis kuj rau kos duab - nrog rau xim, number case los yog mem hluav. Txawm hais tias rau lub hom phiaj no, cov kws tshaj lij feem ntau yuav cov ntawv xim dej tshwj xeeb, nrog qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom.

Qhov twg thiab yuav ntawv npaum li cas?

Yog li, koj paub tias koj xav tau daim ntawv no rau dab tsi, koj paub tias qhov ntom ntawm daim ntawv dab tsi yuav tsum yog, tab sis qhov twg yuav nws? Feem ntau nyob rau hauv ib lub khw muag ntawv sau los yog khw muag ntawv. Daim ntawv Whatman yog muag ntawm tus nqi pheej yig - koj yuav tsum them tsis pub ntau tshaj 20 rubles rau daim ntawv A1. Cov ntawv me me yuav raug nqi koj tsawg dua.