Maxay tahay sababta dhoobada malabka loo isticmaalo ay u tahay "saldhigga waxqabadka" ee qalabka dubista?

Thekaydinta dhoobada malabka iyo malabkawaa doorka "Gareeyaha Kuleylka" ee foornada dubista ee dib u soo noolaynta.
Tan waxaa lagu muujiyey labada dhinac ee soo socda:
1. Keydinta tamarta aadka u daran: Iyada oo loo marayo kaydinta kulaylka iyo sii deynta xilliyeedka, kulaylka gaaska qiiqa heerkulka sare leh (qiyaastii 1000℃) ee la sii daayo ayaa loo soo celiyaa heer aad u sarreeya si loo kululeeyo hawada gubashada taageerta ilaa heerkul u dhow kan foornada (>1000℃). Habkani wuxuu gaari karaa heer kaydin tamar oo dhammaystiran oo ah 50% ilaa 70% foornada dubista, taasoo si weyn u yareynaysa qiimaha halkii tan ee birta ah.

2. Dubista heerkulka sare leh ee degdega ah: Hawada heerkulka sare leh ee la kululeeyay waxay taageertaa gubasho xooggan, taasoo u suurtagelinaysa baakadaha qabow inay ku kululaadaan ilaa 1100℃ 30 daqiiqo gudahood, halka baakadaha khadka tooska ah ay u baahan yihiin oo keliya 10-15 daqiiqo. Tani ma aha oo kaliya inay soo gaabinayso waqtiga sugitaanka wax soo saarka, laakiin sidoo kale waxay ka hortagtaa dildilaaca dahaarka oo ay keento dubista gaabiska ah, taasoo kordhin karta cimrigeeda adeegga in ka badan 10%.