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- This article is about the building material. For the adhesive medical dressing, see Sticking plaster.
Gypsum plaster
Plaster of Paris, or simply plaster, is a type of building material based on calcium sulfate hemihydrate, nominally CaSO4*0.5H2O. It is created by heating gypsum to about 150 oC.
CaSO4 · 2H2O → CaSO4 · 0.5H2O + 1.5H2O (released as steam).
A large gypsum deposit at Montmartre in Paris is the source of the name*. When the dry plaster powder is mixed with water, it re-forms into gypsum, initially as a paste but eventually hardening into a solid. The structure consists of sheets of Ca²+ and SO4²- ions held together by hydrogen bonds in the water molecules. The grip between these sheets is easily broken, so plaster is fairly soft.
Plaster is used as a building material similar to mortar or cement. Like those materials plaster starts as a dry powder that is mixed with water to form a paste, which then hardens. Unlike those materials plaster remains quite soft after drying, and can be easily manipulated with metal tools or even sandpaper. These characteristics make plaster suitable for a finishing, rather than a load-bearing material.
More on [ Plaster ]
Decorative Finishes :: Wall, Floor and Decorative Finishes
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd
Donhead_Books (Donhead Publishing) Fri, 11 Dec 2009 12:30:28 -0000
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd - @RichardIreland2
paperspaints (Patrick Baty) Thu, 10 Dec 2009 20:59:25 -0000
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd - @RichardIreland2
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd - good article
Quinny105 (Neil Quinn) Thu, 10 Dec 2009 20:57:42 -0000
RT @OldHouseWeb: A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd - good article
A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd
OldHouseWeb (OldHouseWeb) Thu, 10 Dec 2009 20:50:47 -0000
A primer on repairing plaster walls & ceilings, plus their ornamental trim. http://bit.ly/86OZKd
@paperspaints American perspective very interesting thanks Patrick. Via @paperspaints The Ornamental Plaster Trade http://bit.ly/6Iryc6
RichardIreland2 (Richard Ireland) Thu, 10 Dec 2009 16:17:54 -0000
@paperspaints American perspective very interesting thanks Patrick. Via @paperspaints The Ornamental Plaster Trade http://bit.ly/6Iryc6
RT @OldHouseWeb: The Ornamental Plaster Trade http://bit.ly/6Iryc6 - NB @RichardIreland2
paperspaints (Patrick Baty) Thu, 10 Dec 2009 16:11:29 -0000
RT @OldHouseWeb: The Ornamental Plaster Trade http://bit.ly/6Iryc6 - NB @RichardIreland2
Associates - Distributor of domes, cornices, vents, rosettes, fire surrounds, and moulding. Sydney, Australia.
Co Ltd. - Producers of decorative mouldings and fibrous plaster cornices. West Sussex, UK.
Meta Description: [ Over 120 different styles of High Quality Cornice, Coving and Textured Ceiling Materials.
Family run business with over 35 multi-skilled staff specialising in restoration on listed
buildings, repairs on cracks or just problem ceilings. ]
Abby Mouldings - Offers archways, mouldings, statues, plaques, and fire surrounds. Specializes in restoration work. Devon, UK.
Archcraft - Manufacturer of handcrafted, interior archways for remodeling and new construction.
Meta Description: [ Archways and Interior Archways handcrafted by ArchCraft for home improvement building and remodeling ]
Archicast - Specializes in custom ornamental plaster and cast stone work for renovation and new construction.
Meta Description: [ Architectural custom caster repairs and recasts ornamental plaster and stone for renovation and restoration construction projects,interior and exterior ]
Artisan Finishes - Provides a range of decorative and innovative finishes using Milestone hybrid portland cement and plasterwork.
Meta Description: [ You can learn to create exciting architectural details using Milestone Hybridized Portland Cement. Any custom color. . Numerous photo examples. ]
Butcher Plasterworks - Manufactures cornices, scrolls, dados, columns, niches, period architectural and decorative mouldings. London.
Farrs - Suppliers of mouldings, niches, fire surrounds, pedestals, and figurines. Staffordshire, UK.
Meta Description: [ Farrs (Plaster panache) suppliers of decorative plaster mouldings, corniche (coving) niches, fire surrounds, pedestals, figurines, new contract supply and fit division. ]
Felber Ornamental Plastering Corporation - Offering cornices, rosettes, brackets and corbels, sculptures, niches and domes.
Meta Description: [ Felber Ornamental Plastering Corporation designs, produces and installs commercial and
residential plaster architectural ornamentation ]
Locker and Riley - Specializing in fibrous plaster, composition and light stone mouldings. Mouldings exported world-wide.
Meta Description: [ Locker & Riley:-Specialist Fibrous Plasterers, Composition and light Stone Mouldings. Mouldings exported world-wide. Tel.+44(0)1268 574101 ]
Plaster Master Industries - Plaster and industrial machines, foam, molds, rotational casting, pigments, and coloring concrete.
Meta Description: [ Plaster machines, foam, help on mixing plaster, rotational casting machines, molds, sculpture techniques, plaster pigments and coloring concrete ]
Plaster Products - Manufacturers of classical mouldings, cornices, centerpieces, panel moulds, archways and special works. Bolton, UK.
Meta Description: [ Plaster Products manufacturer and supplier of plaster products mouldings castings, can design, create an exact reproduction of existing plasterworks for renovation or restoration. All our products are precision moulded from glass fibre and silicone rubber moulds, reinforced with wooden lattice an... ]
Plaster Unique - UK based offer of plaster mouldings, dado rails to full arches. Repairs and restoration.
Meta Description: [ Plaster Unique produce fine quality plaster mouldings, ranging from dado rails to full arches. Fully customised and if you already have plasterwork then we do repair and restor. ]
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Plaster Visions and Design Group Inc. - Manufacturer of plaster moldings, cornices, niches, capitals, pediments and medallions. New York.
Meta Description: [ Italian hand crafted architectural mouldings for ceilings, trim, fireplace mantels, plaques, columns, crown mouldings. ]
Plastercraft US - Produces ornamental plaster moldings for use as interior decoration. Based in Carson, California.
Meta Description: [ Plastercraft produces high quality ornamental plaster moldings for use as interior decoration. Plastercraft is a unique company that will take a personal interest in your designing, working hands on with you and your architect, builder, etc, to give you the quality moldings you require. ]
Plasterwrx - Dados, cornices, niches and mouldings as well as restoration service. Located in the UK.
Meta Description: [ plasterwrx is a UK based Plastering company that specialised in restoration and plaster manufacture. With a history for producing and installing quality items of plaster by skilled craftsmen. ]
Rossi Stucchi S.n.c. - Specialized in the manufacture of ornamental plaster mouldings in reinforced gypsum. Italy.
Meta Description: [ Plaster Mouldings for Interior Decorating. Rossi Stucchi is specialized in realization fine quality ornamental plasters mouldings ]
Sandstone Designs, Inc. - Manufacturer of architectural fireplaces, cast stone, columns, moldings, wall caps, and mantels.
Sepp Leaf Products, Inc. - Offers a tintable plaster product that can incorporate dry pigments, marble dust, or mica powders for a unique affect. Product and distributor information.
Meta Description: [ Kolcaustico Venetian Plaster is the elegant, tintable wall finishing material that offers unlimited opportunities to create distinctive and unique surfaces. ]
Simply Elegant Donnicelli - Ornamental cement and plaster products for internal and external applications. Italy.
Meta Description: [ Simply Elegant Donnicelli vuole offrire ai suoi clienti manufatti artistici creati da maestri artigiani che soddisfino in pieno ogni esigenza. ]
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