Cov grammage (g / m²) ntawm cov ntawv kab lis kev cai tsis ncaj qha ntsig txog nws qhov zoo. Txawm li cas los xij, nyob rau hauv tib hom ntawv, ntau dua grammage feem ntau txhais tau tias nws yog tuab, tawv, thiab muaj kev paub zoo dua rau cov neeg siv. Grammage yog qhov taw qhia ntawm daim ntawv tuab thiab cov khoom siv, thaum "zoo" muaj cov khoom zoo xws li whiteness, smoothness, fiber uniformity, folding endurance, thiab environmental friendliness. Qhov ob tsis tuaj yeem sib npaug yooj yim.
Grammage ≠ Zoo: Qhov sib txawv tseem ceeb nyob hauv qhov chaw ntawm "hom tib yam"
Tib hom ntawv (piv txwv li, tag nrho 80g offset ntawv): Daim ntawv nrog tib grammage tab sis cov hom sib txawv los yog cov khoom sib txawv tuaj yeem muaj qhov sib txawv zoo vim qhov txawv ntawm cov khoom siv raw (ntoo pulp piv), cov txheej txheem ntau lawm, thiab cov khoom ntxiv (xws li cov tshuaj fluorescent whitening agents). Piv txwv li, daim ntawv uas muaj cov ntsiab lus ntawm cov ntoo siab yog hloov tau yooj yim dua thiab tsis tshua muaj xim daj, thaum daim ntawv nrog cov khoom siv ntau dhau tuaj yeem ua rau tawg thiab tawg yooj yim.
Ntau hom ntawv: Grammage ib leeg tsis tuaj yeem txiav txim siab zoo. Piv txwv li, thaum 350g grey board ntawv yog tuab, nws cov kev siv thiab kev ntxhib los mos yog txawv kiag li ntawm 105g coated ntawv, ua rau kev sib piv ncaj qha ntawm "zoo" tsis yooj yim sua.
grammage cuam tshuam li cas rau cov neeg siv kev paub thiab "pom zoo"?
Txawm hais tias grammage tsis sib npaug ntawm qhov zoo, nws cuam tshuam ncaj qha rau tus neeg siv qhov kev paub dhau los, yog li tsim qhov kev txiav txim siab ntawm "zoo":
70g / m²: Lub teeb yuag thiab kev lag luam, haum rau cov ntawv sau thiab cov ntaub ntawv sab hauv. Txawm li cas los xij, ob npaug -sided luam ntawv yog nquag los ntshav- los ntawm, thiab nws zoo li nyias, yooj yim pom tau tias "qhov nruab nrab zoo."
80g / m²: Paub tias yog "golden grammage rau kev siv hauv chaw ua haujlwm," nws muaj qhov nruj zoo thiab tsis tshua muaj cov xim number case los ntawm, haum rau cov ntaub ntawv raug cai xws li daim ntawv cog lus thiab cov ntaub ntawv rov qab, thiab feem ntau suav tias yog "kev ntseeg tau zoo."
100g / m² thiab siab dua: tuab thiab textured, siv rau xim luam ntawv thiab daim ntawv qhia sab hauv, muab qhov "siab- kawg, kev tshaj lij" zoo.
Core Indicators tiag tiag txiav txim siab zoo ntawm kab lis kev cai ntawv
Dhau li ntawm grammage, cov ntsuas lub cev thiab kev nyab xeeb / kev nyiam huv hauv qab no zoo dua qhia qhov tseeb ntawm daim ntawv:
Whiteness and Gloss: Affects visual comfort; excessively high gloss (>90%) tuaj yeem qhia txog qhov sib ntxiv ntawm cov tshuaj fluorescent whitening ntau dhau, uas tuaj yeem ua mob rau lub qhov muag nrog kev siv ntev.
Smoothness: Txiav txim siab qhov sib xws ntawm tus lej hloov pauv thaum luam ntawv, cuam tshuam rau qhov pom tseeb ntawm cov duab thiab cov ntawv.
Tensile Strength thiab Folding Endurance: Reflects lub durability ntawm daim ntawv; lub zog siab txhais tau hais tias nws tsis tshua muaj kua muag thaum luam ntawv thiab nyeem ntawv.
Cov ntsuas kev nyab xeeb thiab huv si: Ib puag ncig tus qauv HJ 410-2017 nruj me ntsis txwv kev tso tawm cov hlau hnyav xws li txhuas thiab cadmium, formaldehyde, thiab VOCs. Tsuas yog daim ntawv uas ua tau raws li tus qauv no yeej muaj kev nyab xeeb thiab txhim khu kev qha.
