are older versions that release alcohol as a byproduct, leading to slight shrinkage.
: How well the material maintains its shape over time (critical for the delay between taking the impression and pouring the plaster). Download MATÉRIAUX EMPREINTE ÉLASTIQUES pdf
: Changes from a gel to a liquid (sol) with heat and back to a gel when cooled. It requires specialized water-cooled trays. are older versions that release alcohol as a