Daim ntawv thaub qab yog txheej txheem ntawm ib qho yooj yim - kua muag daim ntawv lo. Nws tiv thaiv cov nplaum los ntawm kev sib kis thaum thauj thiab khaws cia, thaum tseem muab daim ntawv lo nrog flatness thiab tearability. Cov ntaub ntawv thaub qab feem ntau suav nrog cov ntawv glassine thiab kraft ntawv. Glassine daim ntawv, vim nws qhov chaw du thiab ntom ntom, ua kom daim ntawv lo tiaj tus thiab tearability; thaum daim ntawv kraft, vim nws lub zog ntau dua thiab dej tsis kam, yog qhov tsim nyog rau daim ntawv thov daim ntawv thov uas xav tau ib qho kev thauj khoom -cov kabmob muaj peev xwm.
Ntxiv nrog rau cov ntaub ntawv yooj yim saum toj no, yooj yim- cov ntawv tsim kua muag kuj tseem tuaj yeem muaj lwm cov txheej txheem ua haujlwm ntxiv raws li cov kev xav tau tshwj xeeb, xws li tiv thaiv- cov khaubncaws sab nraud povtseg thiab cov txheej tiv thaiv. Kev tiv thaiv- txheej txheej cuav tuaj yeem ua tiav los ntawm cov txheej txheem luam ntawv tshwj xeeb lossis cov khoom siv los tiv thaiv daim ntawv lo los ntawm kev nyiag los yog cuam tshuam nrog; Cov khaubncaws sab nraud povtseg tuaj yeem muab cov dej tiv thaiv ntxiv, tiv thaiv roj, lossis ua kom puas, ua kom lub neej ntev ntawm daim ntawv lo.