raw materials are selected carefully., , grain size is controlled during preparation., , poor-quality materials affect the melting process., , the glass quality depends on raw material selection., , impurities are removed before batching., , moisture is kept at a controlled level., , chemical composition is checked regularly., , incorrect materials can cause defects., .

per en/la

Tauler de classificació

Estil visual

Opcions

Canvia de fonament

)
Restaurar desada automàtica: ?