Kev qhia rau iav frosting cream
1. Muab cov iav ethching cream sib npaug ua ntej siv.
2. Ntxuav lub khob nrog tshuaj pretreatment, ces ntxuav nws nrog dej huv, thiabziab nws.
Lus Cim: Txoj Kev Npaj ntawm cov tshuaj pretreatment: ntxiv 2kg ntawm HCL(＞32 feem pua) rau hauv 8KG dej, sib tov nws tusyees, ces cia nws tseem rau 30-60 feeb ua ntejsiv.
ib. Muab lub phaj rau ntawm lub khob.
b. Lus Cim: Qhov kev ncua deb ntawm lub phaj thiab iav yog li 2 hli -5mm.
c. Scraping tus kom muaj nuj nqis iav etching cream rau ntawm iav nto tusyees.
d. tshem lub phaj.
e. Tuav lub khob rau 60-120 vib nas this.
f. Ntxuav cov etching cream rau ntawm iav nto nrog dej huv.
g. Qhuav lub khob.
