Cov kauj ruam yooj yim rau blackening kev kho mob ntawm cov cua sov raj:

Cov kauj ruam yooj yim rau blackening kev kho mob ntawm cov cua sov raj:

Qhov yuav tsum tau ua ua ntej rau kev kho blackening yog ua kom lub ntsej muag ntawm lub raj cua sov kom huv si thiab huv si. Yog hais tias muaj impurities rau ntawm nws nto, nws yuav tsis conducive rau blackening kev kho mob.

Thawj qhov B yuav tsum tau ua yog tshem tawm cov organic teeb meem ntawm qhov chaw, uas yog hu ua degreasing kev kho mob. Txhua tus neeg yuav tsum tau so kom paub tseeb tias kev kho degreasing yooj yim ua tiav ntawm no. Defatting kev kho mob tsuas yog yuav tsum muaj cov tshuaj degreasing. Thiab cov tshuaj degreasing kuj yooj yim muaj nyob hauv khw. Qhov yuav tsum tau ua rau kev kho degreasing yog kom tswj tau qhov siab alkalinity ntawm cov kua, nrog rau cov pH ruaj khov ntawm ib ncig ntawm 13. Lub sijhawm yuav tsum tau ua yog kwv yees li 30 feeb. Tom qab qhov kev kho no, qhov saum npoo yuav tsum tau ntxuav kom tshem tawm cov impurities tsim los ntawm cov tshuaj tiv thaiv. Kev ntxuav yuav tsum tau ua nrog dej huv kom ntseeg tau tias muaj kev huv huv ntawm qhov chaw ntawm lub raj cua sov.

Tom qab alkaline ntxuav, nws yuav tsum tau pickled. Vim nws qhov chaw tsis yog tsuas yog muaj alkaline organic teeb meem, tab sis kuj acidic organic teeb meem. Yog li acidic tu kuj tseem tsim nyog heev. Tus nqi pH ntawm 3 yog xav tau rau acidity, thiab lub sijhawm ua haujlwm yuav tsum tsis pub tshaj 10 feeb.

Thaum kawg, kev kho blackening yuav raug ua. Ph tau lees tias nyob nruab nrab ntawm 2-4. Lub sijhawm 10 feeb yog txaus. Tom qab ua tiav, pib nrog kev tu.

Cov kauj ruam kawg yog kom qhuav lub raj cua sov. Kev ziab yog tshem tawm cov dej adhering rau saum npoo ntawm lub raj cua sov. Thaum kawg, nws yog lub sijhawm los thov roj.

Hauv cov txheej txheem tsim hluav taws xob cua sov, kev kho blackening yog siv. Yog hais tias ua raws li tsib lub ntsiab lus saum toj no, kev kho blackening ntawm cov hluav taws xob cua sov raj tuaj yeem ua tiav. Tom qab kev kho mob, nws yuav txhim kho qhov hnav tsis kam thiab hardness ntawm qhov chaw ntawm lub tshuab hluav taws xob cua sov, tsis muaj kev cuam tshuam rau cov khoom hauv lub raj hluav taws xob.

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