https://en.wikipedia.org/wiki/Brewing#Brew_kettle_or_copper Copper is the traditional material for the boiling vessel, because copper transfers heat quickly and evenly, and because the bubbles produced during boiling, and which would act as an insulator against the heat, do not cling to the surface of copper, so the wort is heated in a consistent manner "Sigitas" wrote in message news:n806nm$aa8$1@trimpas.omnitel.net... On 2016-01-23 17:32, Tomas wrote: > kaip turetu reaguoti alus su variniu indu. Kad visur variniai, įdomu kodėl?