Sheepskin, tseem hu ua industrial parchment, yog ib daim ntawv ntim pob tshab siv los ua phau ntawv lossis muab cov ntaub ntawv sau. Nws yog tsuas yog siv rau ntim tshuab qhov chaw, twj paj nruag, tshuaj lom neeg tshuaj, thiab lwm yam. Cov ntaub ntawv tseem ceeb rau kev tsim parchment yog tshuaj ntoo pulp thiab rag pulp.
Tom qab tig cov ntaub ntawv raw rau hauv daim ntawv, lawv mam li xa mus rau 72% concentrated sulfuric acid da dej rau kev ua haujlwm rau ob peb feeb, uas yog hu ua "parchment paper" txheej txheem. Cov yam ntxwv ntawm daim ntawv parchment yog nruj qauv, muaj zog roj kuj, waterproof, siab ntub lub zog, tsis breathable, thiab zoo elasticity. Cov ntawv tau dhau los kho cov tawv nqaij yaj thiab muaj lub zog siab thiab muaj qee qhov kev tiv thaiv folding. Yuav siv tau raws li ib tug semi permeable membrane.
Cov ntaub ntawv yooj yim ntawm Parchment Ntawv
Xa kev nug