Ngati mumakonda thumba, ndipo bukuli likunena kuti mugwiritse ntchito zikopa, kodi mumatani poyamba? Zapamwamba, zofewa, zapamwamba, zodula kwambiri ... Mulimonsemo, poyerekeza ndi wamba, zimatha kupereka anthu kumverera kwapamwamba kwambiri. M'malo mwake, kugwiritsa ntchito chikopa chenicheni cha 100% kumafuna uinjiniya wambiri kuti ugwiritse ntchito zida zoyambira zomwe zingagwiritsidwe ntchito pazogulitsa, kotero mtengo wazinthu zoyambira udzakhala wapamwamba.
Zosiyanasiyana, mwa kuyankhula kwina, zikopa zimathanso kugawidwa m'makalasi apamwamba komanso otsika. Chofunikira choyamba pakuzindikira kalasi iyi ndi 'chikopa chakuda'. 'Chikopa choyambirira' sichimakonzedwa, chikopa chenicheni cha nyama. Izi ndizofunikanso, ndipo ndizofunikanso, koma palibe mmodzi wa iwo amene angafanane ndi ubwino wa zipangizo. Chifukwa izi zidzakhudza ubwino wa mankhwala onse.
Ngati tikufuna kusandutsa zikopa zosaphika kukhala zopangira, tiyenera kudutsa njira yotchedwa 'kutentha zikopa'. Izi zimatchedwa 'Kufufuta' mu Chingerezi; ndi '제혁 ( tanning ) ' mu Chikorea. Magwero a mawuwa ayenera kukhala 'tannin (tannin)', kutanthauza zipangizo zochokera ku zomera.
Khungu la nyama losakonzedwa limakonda kuvunda, tizirombo, nkhungu ndi mavuto ena, kotero limakonzedwa molingana ndi cholinga chogwiritsidwa ntchito. Njirazi zimatchulidwa pamodzi kuti "kufufuta". Ngakhale pali njira zambiri zofufutira, "chikopa cha tannin" ndi "chromium tanned chikopa" amagwiritsidwa ntchito kwambiri. Kupanga kochuluka kwa zikopa kumadalira njira ya 'chrome' iyi. M'malo mwake, zopitilira 80% zachikopa zimapangidwa ndi 'chikopa cha chrome'. Ubwino wa chikopa chamasamba ndi bwino kuposa chikopa wamba, koma pogwiritsira ntchito, kuwunika kumakhala kosiyana chifukwa cha kusiyana kwa zomwe amakonda, kotero chilinganizo "chikopa chamasamba = chikopa chabwino" sichiyenera. Poyerekeza ndi chrome chikopa chofufutika, chikopa chamasamba chimasiyana ndi njira yopangira.
Nthawi zambiri, kumalizidwa kwa chikopa cha chrome ndikuchita kukonza pamwamba; chikopa chofufutika masamba safuna ndondomekoyi, koma amasunga makwinya oyambirira ndi maonekedwe a chikopa. Poyerekeza ndi zikopa wamba, zimakhala zolimba komanso zopumira, komanso zimakhala zofewa mukazigwiritsa ntchito. Komabe, pakugwiritsa ntchito, pangakhale zovuta zambiri popanda kukonza. Chifukwa palibe filimu yokutira, ndizosavuta kukanda ndikudetsedwa, kotero zitha kukhala zovuta kuziwongolera.
Chikwama kapena chikwama kuti mukhale ndi nthawi yochuluka ndi wogwiritsa ntchito. Popeza palibe zokutira pamwamba pa masamba tanned chikopa, ali ndi kumverera mofewa kwambiri ngati khungu la mwana pachiyambi. Komabe, mtundu wake ndi mawonekedwe ake zidzasintha pang'onopang'ono chifukwa cha zifukwa monga nthawi yogwiritsira ntchito ndi njira zosungira.
Nthawi yotumiza: Jan-17-2023
