For especially hard finish plaster, the gypsum is completely dehydrated at high temperature, and such chemicals as alkali sulfate, alum, or borax are added.
With an additive to retard the set, it is called wall, or hard wall, plaster, which can provide passive fire protection for interior surfaces.
Cooled to room temperature, the clay is as hard as plaster, and it is this hardened clay that is carved and shaved with steel tools to make a precise car model.
To prepare the acrylic samples, a pink modeling wax (Cavex Set Up Modeling Wax, Haarlem, The Netherlands) with dimensions of 10 × 10 × 2 mm was placed in hard dental plaster (Moldabaster S, Heraeus Kulzer GmBH, Hanau, Germany) in a two-part mold using a standard dental flask.
Mike Weipert, a strapping teamster in a Levi's denim jacket and a hard hat plastered with decals, was surprised that anyone outside the site had heard of it.
Instead he used an unstable layer of dried gesso (a hard compound of plaster) that easily buckled and cracked.
It has been almost impossible for black Senate candidates to crack the dried plaster hard racial ceiling of the U.S. Senate.
Josh Dayton's "Hard Knife," a painted plaster sculpture, has a chalky yet almost metallic finish that is somehow simultaneously attractive and repellent.
She attributes the success of the scenery's delightfully creepy atmosphere to the hard work of the plaster department, headed by Steve Transfield, whose experience creating off-putting characters comes with a list of credits, including Eastern Promises, The Brothers Grimm, and Benicio del Toro's The Wolf Man. .
Moreover its bark is bruised and applied as plaster over hard tumours [ 11], whereas the latter taxon finds use as being purgative, cardiotonic, diuretic, and hypotensive [ 12].
