Nws pH siab ua rau cov khoom siv organic, ua rau cov zis yog cov khoom zoo tshaj plaws rau cov neeg laus siv hauv softening thiab tanning tsiaj hides. Kev ntub cov tawv nqaij hauv cov zis kuj ua rau nws yooj yim dua rau cov neeg ua haujlwm tawv kom tshem tawm cov plaub hau thiab cov nqaij ntawm daim tawv nqaij.
Yuav ua li cas tan zais zis?
Qhov no yog ua tiav los ntawm kev ntub cov tawv nqaij hauv cov zis, pleev xim rau nws nrog cov kua qaub alkaline sib tov, lossis tsuas yog cia cov tawv nqaij ua kom tawv nqaij tau ob peb lub hlis tom qab ntawd dipping nws hauv ntsev tov. Tom qab cov plaub hau tau xoob lawm, cov tanners muab lawv nrog rab riam.
Pob tanners yuav zis?
Q Los ntawm Bob Fleck: Ib yam khoom nthuav tawm hauv online hauv qab lub npe Nthuav Keeb Kwm hais tias, Lawv tau siv zis los ua tawv nqaij tawv tsiaj, yog li cov tsev neeg tau siv tag nrho cov kua hauv lub lauj kaub thiab tom qab ntawd ib zaug ib zaug. hnub nws tau muag rau tannery… Piv txwv li, cov neeg Loos tau sau cov zis rau lub hom phiaj no thiab txawm muab se rau nws.
Cov neeg Loos siv zis rau dab tsi?
Cov neeg Loos tau siv cov fwj Portuguese tso zis thiab siv uas yog yaug GROSS! Importing fwj cov zis tau nrov heev uas huab tais Nero tau them se rau kev lag luam. Cov ammonia hauv cov zis tau xav tias yuav tshuaj tua kab mob hauv qhov ncauj thiab ua kom cov hniav ntxuav hniav dawb, thiab cov zis tseem yog cov tshuaj ntxuav qhov ncauj kom txog rau thaum 18th centuries.
tso zis siv rau dab tsi?
Kev ntxuav tes. Muab hais tias urea hauv cov zis tawg mus rau hauv ammonia, cov zis tau siv los ntxuav. Hauv lub sijhawm ua ntej kev lag luam, cov zis tau siv - hauv daim ntawv lant lossis hnub nyoog tso zis - ua kua dej huv. Cov zis kuj tau siv los ntxuav hniav dawb hauv Ancient Rome.