This can be due either to the material not being properly annealed before brazing, or to thermal expansion stress during heating.
The straw aided the evaporation of moisture from within the brick during heating and helped distribute cracks evenly.
The lids are typically loose-fitting to allow gases to escape during heating of a sample inside.
If less water is used, then the result is a dry material (any excess water escaping as steam during heating).
Jam, when made, produces invert sugar during extensive heating under the action of the acid in the fruit.
This variety is mainly used during cooking, since its flavour develops during heating.
It has a similar monounsaturated fat profile which helps to protect the oil from breakdown during heating.
Three ways a material can lose mass during heating are through chemical reactions, the release of adsorbed species, and decomposition.
The crystals re-organize during heating so that they approach the equilibrium crystalline state.
Low moisture content of acid-impregnated feedstock reduces the energy required during subsequent heating.