Pumice - Revision history

MDerrick at 20:29, 22 October 2022

2022-10-22T20:29:04Z

← Older revision		Revision as of 16:29, 22 October 2022
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	[[File:Pumice_USGS.jpg\|thumb\|Pumice]]		[[File:Pumice_USGS.jpg\|thumb\|Pumice]]
	== Description ==		== Description ==
			[[File:Pumiceemr1.jpg\|thumb\|Pumice]]
	A pale gray, porous variety of the volcanic stone [[rhyolite\|rhyolite]]. Pumice is composed of potassium aluminum silicate with small amounts of [[iron\|iron]] and [[alkali\|alkalis]]. Its spongy texture is due to numerous cavities formed by gas bubbles that were trapped when the stone solidified. The stone is lightweight enough to float on [[water\|water]] for months. Pumice is used as an [[abrasive\|abrasive]] for polishing jewelry, cleaning metals, and smoothing [[vellum\|vellum]] and [[parchment\|parchment]]. It has also been used as a clear glaze on stoneware, as a matting agent and as a coarsening agent for texturizing painted surfaces. Pumice was quarried in ancient times from the Greek islands of Melos and Nisyros. Current production comes from Italy (Lipari Islands), Greece, Turkey, Spain, and the United States.		A pale gray, porous variety of the volcanic stone [[rhyolite\|rhyolite]]. Pumice is composed of potassium aluminum silicate with small amounts of [[iron\|iron]] and [[alkali\|alkalis]]. Its spongy texture is due to numerous cavities formed by gas bubbles that were trapped when the stone solidified. The stone is lightweight enough to float on [[water\|water]] for months. Pumice is used as an [[abrasive\|abrasive]] for polishing jewelry, cleaning metals, and smoothing [[vellum\|vellum]] and [[parchment\|parchment]]. It has also been used as a clear glaze on stoneware, as a matting agent and as a coarsening agent for texturizing painted surfaces. Pumice was quarried in ancient times from the Greek islands of Melos and Nisyros. Current production comes from Italy (Lipari Islands), Greece, Turkey, Spain, and the United States.

	~~[[File:Pumiceemr1.jpg\|thumb\|Pumice]]~~
	[[File:Pumiceemr2.jpg\|thumb\|Pumice]]		[[File:Pumiceemr2.jpg\|thumb\|Pumice]]
	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

MDerrick at 20:28, 22 October 2022

2022-10-22T20:28:41Z

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	== Risks ==		== Risks ==

	Contains silica. Inhalation of dust may cause silicosis.		* Contains silica. Inhalation of dust may cause silicosis.
	== Physical and Chemical Properties ==		== Physical and Chemical Properties ==

	Insoluble in water and solvents. Floats on water.		* Insoluble in water and solvents. Floats on water.
			* Ground pumice has angular broken particles with visible broken bubbles
	Ground pumice has angular broken particles with visible broken bubbles

	{\| class="wikitable"		{\| class="wikitable"

MDerrick at 16:49, 29 August 2020

2020-08-29T16:49:49Z

← Older revision		Revision as of 12:49, 29 August 2020
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	[[File:Pumiceemr1.jpg\|thumb\|Pumice]]		[[File:Pumiceemr1.jpg\|thumb\|Pumice]]
			[[File:Pumiceemr2.jpg\|thumb\|Pumice]]
	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

	rhyolite; volcanic glass; Bimsstein (Deut.); Bims (Deut.); piedra pómez (Esp.); pierre ponce (Fr.); pedra-pomes (Port.); elafropetra (Gr.); pomice (It.); puimsteen (Ned.)		rhyolite; volcanic glass; Bimsstein (Deut.); Bims (Deut.); piedra pómez (Esp.); pierre ponce (Fr.); pedra-pomes (Port.); elafropetra (Gr.); pomice (It.); puimsteen (Ned.)
			== Risks ==

	== ~~Other~~ Properties ==		Contains silica. Inhalation of dust may cause silicosis.
			== Physical and Chemical Properties ==

	Insoluble in water and solvents. Floats on water.		Insoluble in water and solvents. Floats on water.
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	\| 1.50		\| 1.50
	\|}		\|}

	~~[[File:Pumiceemr2.jpg\|thumb\|Pumice]]~~
	~~== Hazards and Safety ==~~

	~~Contains silica. Inhalation of dust may cause silicosis.~~

	== Comparisons ==		== Comparisons ==
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	[[media:download_file_209.pdf\|Properties of Common Abrasives]]		[[media:download_file_209.pdf\|Properties of Common Abrasives]]

	== ~~Sources Checked for Data in Record~~ ==		==Resources and Citations==

	* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 Comment: RI = 1.50		* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 Comment: RI = 1.50
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	* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8127		* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8127

	* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Pumice." ~~Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service.~~ 12 May 2004 .		* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Pumice." Accessed 12 May 2004.

	* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000		* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000

MDerrick: /* Comparisons */

2020-05-30T18:30:38Z

Comparisons

← Older revision		Revision as of 14:30, 30 May 2020
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	== Comparisons ==		== Comparisons ==

	[[media:~~download_file_216~~.pdf\|Properties of Common Abrasives]]		[[media:download_file_209.pdf\|Properties of Common Abrasives]]



	== Sources Checked for Data in Record ==		== Sources Checked for Data in Record ==

Jruggiero: Text replace - "\[http:\/\/cameo\.mfa\.org\/materials\/fullrecord\.asp\?name=([^\s]+)\s(.*)\]" to "$2"

2016-05-10T16:38:07Z

Text replace - "\[http:\/\/cameo\.mfa\.org\/materials\/fullrecord\.asp\?name=([^\s]+)\s(.*)\]" to "$2"

← Older revision		Revision as of 12:38, 10 May 2016
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	== Description ==		== Description ==

	A pale gray, porous variety of the volcanic stone [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~rhyolite rhyolite]. Pumice is composed of potassium aluminum silicate with small amounts of [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~iron iron] and [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~alkali alkalis]. Its spongy texture is due to numerous cavities formed by gas bubbles that were trapped when the stone solidified. The stone is lightweight enough to float on [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~water water] for months. Pumice is used as an [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~abrasive abrasive] for polishing jewelry, cleaning metals, and smoothing [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~vellum vellum] and [~~http://cameo.mfa.org/materials/fullrecord.asp?name=~~parchment parchment]. It has also been used as a clear glaze on stoneware, as a matting agent and as a coarsening agent for texturizing painted surfaces. Pumice was quarried in ancient times from the Greek islands of Melos and Nisyros. Current production comes from Italy (Lipari Islands), Greece, Turkey, Spain, and the United States.		A pale gray, porous variety of the volcanic stone [[rhyolite\|rhyolite]]. Pumice is composed of potassium aluminum silicate with small amounts of [[iron\|iron]] and [[alkali\|alkalis]]. Its spongy texture is due to numerous cavities formed by gas bubbles that were trapped when the stone solidified. The stone is lightweight enough to float on [[water\|water]] for months. Pumice is used as an [[abrasive\|abrasive]] for polishing jewelry, cleaning metals, and smoothing [[vellum\|vellum]] and [[parchment\|parchment]]. It has also been used as a clear glaze on stoneware, as a matting agent and as a coarsening agent for texturizing painted surfaces. Pumice was quarried in ancient times from the Greek islands of Melos and Nisyros. Current production comes from Italy (Lipari Islands), Greece, Turkey, Spain, and the United States.

	[[File:Pumiceemr1.jpg\|thumb\|Pumice]]		[[File:Pumiceemr1.jpg\|thumb\|Pumice]]

Jruggiero: Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

2016-05-01T20:17:01Z

Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

← Older revision		Revision as of 16:17, 1 May 2016
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	== ~~Authority~~ ==		== Sources Checked for Data in Record ==

	* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 Comment: RI = 1.50		* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 Comment: RI = 1.50

Unknown user at 12:41, 24 July 2013

2013-07-24T12:41:45Z

New page

[[File:Pumice_USGS.jpg|thumb|Pumice]]
== Description ==

A pale gray, porous variety of the volcanic stone [http://cameo.mfa.org/materials/fullrecord.asp?name=rhyolite rhyolite]. Pumice is composed of potassium aluminum silicate with small amounts of [http://cameo.mfa.org/materials/fullrecord.asp?name=iron iron] and [http://cameo.mfa.org/materials/fullrecord.asp?name=alkali alkalis]. Its spongy texture is due to numerous cavities formed by gas bubbles that were trapped when the stone solidified. The stone is lightweight enough to float on [http://cameo.mfa.org/materials/fullrecord.asp?name=water water] for months. Pumice is used as an [http://cameo.mfa.org/materials/fullrecord.asp?name=abrasive abrasive] for polishing jewelry, cleaning metals, and smoothing [http://cameo.mfa.org/materials/fullrecord.asp?name=vellum vellum] and [http://cameo.mfa.org/materials/fullrecord.asp?name=parchment parchment]. It has also been used as a clear glaze on stoneware, as a matting agent and as a coarsening agent for texturizing painted surfaces. Pumice was quarried in ancient times from the Greek islands of Melos and Nisyros. Current production comes from Italy (Lipari Islands), Greece, Turkey, Spain, and the United States.

[[File:Pumiceemr1.jpg|thumb|Pumice]]
== Synonyms and Related Terms ==

rhyolite; volcanic glass; Bimsstein (Deut.); Bims (Deut.); piedra pómez (Esp.); pierre ponce (Fr.); pedra-pomes (Port.); elafropetra (Gr.); pomice (It.); puimsteen (Ned.)

== Other Properties ==

Insoluble in water and solvents. Floats on water.

Ground pumice has angular broken particles with visible broken bubbles

{| class="wikitable"
|-
! scope="row"| Mohs Hardness
| 6.0-6.5
|-
! scope="row"| Refractive Index
| 1.50
|}

[[File:Pumiceemr2.jpg|thumb|Pumice]]
== Hazards and Safety ==

Contains silica. Inhalation of dust may cause silicosis.

== Comparisons ==

[[media:download_file_216.pdf|Properties of Common Abrasives]]

== Authority ==

* R. J. Gettens, G.L. Stout, ''Painting Materials, A Short Encyclopaedia'', Dover Publications, New York, 1966 Comment: RI = 1.50

* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 640

* Ralph Mayer, ''A Dictionary of Art Terms and Techniques'', Harper and Row Publishers, New York, 1969 (also 1945 printing)

* R.M.Organ, ''Design for Scientific Conservation of Antiquities'', Smithsonian Institution, Washington DC, 1968

* Matt Roberts, Don Etherington, ''Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology'', U.S. Government Printing Office, Washington DC, 1982

* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982

* ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997

* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 8127

* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "Pumice." Encyclopædia Britannica. 2004. Encyclopædia Britannica Premium Service. 12 May 2004 .

* Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000

* Janet Burnett Grossman, ''Looking at Greek and Roman Sculpture in Stone'', J. Paul Getty Trust, Los Angeles, 2003

* Michael McCann, ''Artist Beware'', Watson-Guptill Publications, New York City, 1979

* Ceramics and Glass Conservation Section, List of Workshop Materials, The British Museum, London

* Conservation Support Systems, Catalog, 1997

[[Category:Materials database]]