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He received his commission as medical officer 3d class in the Royal Netherlands Army in 1828. In 1838 he participated in the 10-day war of Belgian Revolution . While working in Haarlem at the military hospital in 1851, Mathijsen first used plaster of Paris as a bandage. [ 1 ]
Plaster bandages are used to construct an impression of a patient's head and neck, and liquid plaster is used to fill the impression and produce a plaster bust. The transparent material polymethyl methacrylate (Plexiglas, Perspex) is then vacuum formed over this bust to create a clear face mask which will hold the patient's head steady while ...
In the form of γ-anhydrite (the anhydrous form), it is used as a desiccant. One particular hydrate is better known as plaster of Paris, and another occurs naturally as the mineral gypsum. It has many uses in industry. All forms are white solids that are poorly soluble in water. [5] Calcium sulfate causes permanent hardness in water.
A commercial retardant premix additive sold by USG to trade interior plasterers includes at least 40% potassium bitartrate. The remaining ingredients are the same plaster of Paris and quartz-silica aggregate already prominent in the main product. This means that the only active ingredient is the cream of tartar.
The end of the Roman Empire in the west, and the creation of the Merovingian dynasty in the 5th century, with its capital placed in Paris by Clovis I, confirmed the new role and name for the city. The adjective Parisiacus had already been used for centuries. Lutetia had gradually become Paris, the city of the Parisii. [22]
The use of scagliola declined in the 20th century. [3] Scagliola is a composite substance made from plaster of Paris, glue and natural pigments, imitating marble and other hard stones. The material may be veined with colors and applied to a core, or desired pattern may be carved into a previously prepared scagliola matrix.
Visitors could climb stairs to view a plaster of Paris model of the Earth's surface, complete with mountains and rivers to scale. Eartha, the world's largest rotating globe with a diameter of 12 m (41 ft), located at the DeLorme headquarters in Yarmouth, Maine. This corresponds to a scale of about 1:1.1 million. Eartha was constructed in 1998.
The modern use of this material may be said to have started then, but the use of fibrous plaster was known and practiced by the Egyptians long before the Christian era; for ancient coffins and mummies still preserved prove that linen stiffened with plaster was used for decorating coffins and making masks.