Thawj kauj ruam ntawm kev sib xyaw yog los tswj cov ntsiab lus ntawm txhua qhov kev xyaw thiab qhov kub ntawm lub ci, kom lub hardness thiab cov khoom xyaw tuaj yeem yog qhov ruaj khov. Tom qab sib tov, vim hais tias lub colloid tseem muaj impurities thiab tsis muaj khaub ncaws hnav, nws yuav tsum tau lim. Ib qho ntxiv rau kom ntseeg tau tias qhov colloid yog pub dawb ntawm impurities, lub lim yuav tsum ua kom paub tseeb tias cov roj hmab cov menyuam tuaj yeem ua rau muaj kev ntxhov siab. Cov kauj ruam ntawm kev ua roj hmab chais thiab lim yog qhov tshwj xeeb rau cov tshuab ceev ceev, thiaj li los tiv thaiv kev nthuav dav lossis kev cog lus los ntawm kev sib txawv.
Tom qab ntawd cov roj hmab muaj rhuab, nias thiab vulcanized los tswj cov yas ziab, kom ib zaug shrinkage tuaj yeem txo qis tsawg kawg. Tus txheej txheem kho tau tuaj yeem ua rau nws muag muag thiab khov tsis poob nws lub qhov muag muag, thiab thaum kawg tuaj yeem hloov tus mem kua.
Kawg yog sib tsoo thiab polishing. Tsis tas yuav muaj qhov kub tsis tu ncua rau ob kauj ruam no. Txwv tsis pub, qhov ntsuas kub yog tsawg dhau, nws yog qhov yooj yim kom loj tuaj hauv zos, thiab qhov kub thiab txias dhau. Qhov saum npoo ntawm cov roj hmab muaj roj roj carbonisation yog nquag mus rau cov menyuam roj hmab, thiab cov yam ntxwv zoo, thiab tsis tuaj yeem hloov mem kua zoo. , Ua rau muaj pov tseg. Ob kauj ruam ob kauj ruam no yog tus yuam sij rau kev txiav txim siab qhov zoo ntawm cov roj hmab cov menyuam. Txawm hais tias qhov chaw ntawm cov roj hmab muaj roj hmab zoo nkaus li du, tseem muaj ntau ntau yam me me tsis xwm yeem rau saum npoo. Kev sib tsoo thiab ua polishing yog ua kom cov roj hmab yob ntau dua hauv qhov loj me, smoother nto, zoo dua ink hloov kev ua tau zoo, thiab ntau dua luam ntawv zoo
Lub Sijhawm Post: Nov-10-2020
