Difference between revisions of "Ammoniac gum"
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[[File:34.115sample1cameo.jpg|thumb|Ammoniac Gum]] | [[File:34.115sample1cameo.jpg|thumb|Ammoniac Gum]] | ||
== Description == | == Description == | ||
| + | [[File:ammoniac_gum.jpg|thumb|Ammoniac Gum]] | ||
| + | A complex gum/oil/resin mixture obtained from the stems of carrot family plant, ''Dorema ammoniacum'', native to Iran and India. Ammoniac is a strong smelling exudate that dries to form hard, brittle, dark yellow lumps. It contains approximately 50-70% resin, 18-26% gum and 1-7% oil. Ammoniac is typically prepared for use either as a water emulsion or as a mixture with [[mastic%20resin|mastic]] and [[isinglass|isinglass]]. This makes a strong cement that is used to adhere [[gilt|gilding]], set [[gemstone|gemstones]], and repair [[porcelain|porcelain]]. Ammoniac is also used in perfumes and medicine. | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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[[[SliderGallery rightalign|MFAGumammoniac.jpg~FTIR]]] | [[[SliderGallery rightalign|MFAGumammoniac.jpg~FTIR]]] | ||
| − | == | + | == Risks == |
| + | |||
| + | * Ingestion may cause vomiting. | ||
| + | * Linde: [https://www.lindeus.com/-/media/corporate/praxairus/documents/sds/ammonia-nh3-safety-data-sheet-sds-p4562.pdf?la=en SDS] | ||
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| + | == Physical and Chemical Properties == | ||
Slightly soluble in water, ethanol, ether, vinegar or weak alkali. Forms emulsions with water. | Slightly soluble in water, ethanol, ether, vinegar or weak alkali. Forms emulsions with water. | ||
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! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 45-55 | + | | 45-55 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.207 | + | | 1.207 g/ml |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | + | * Peter Lynn, "How to Prepare and Gild with Gum Ammoniac" [http://www.geocities.com/CollegePark/Library/2036/gumammon.html www.geocities.com/CollegePark/Library/2036/gumammon.html] | |
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* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 664 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 664 | ||
* ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 518 | * ''The Merck Index'', Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 518 | ||
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* George Savage, ''Art and Antique Restorer's Handbook'', Rockliff Publishing Corp, London, 1954 | * George Savage, ''Art and Antique Restorer's Handbook'', Rockliff Publishing Corp, London, 1954 | ||
Latest revision as of 12:25, 26 April 2022
Description
A complex gum/oil/resin mixture obtained from the stems of carrot family plant, Dorema ammoniacum, native to Iran and India. Ammoniac is a strong smelling exudate that dries to form hard, brittle, dark yellow lumps. It contains approximately 50-70% resin, 18-26% gum and 1-7% oil. Ammoniac is typically prepared for use either as a water emulsion or as a mixture with mastic and Isinglass. This makes a strong cement that is used to adhere gilding, set gemstones, and repair Porcelain. Ammoniac is also used in perfumes and medicine.
Synonyms and Related Terms
Dorema ammoniacum; gum ammoniac; goma amoniaco (Esp.); ammoniacum; ammoniakum; ammonial gum
Risks
- Ingestion may cause vomiting.
- Linde: SDS
Physical and Chemical Properties
Slightly soluble in water, ethanol, ether, vinegar or weak alkali. Forms emulsions with water.
| Melting Point | 45-55 C |
|---|---|
| Density | 1.207 g/ml |
Resources and Citations
- Peter Lynn, "How to Prepare and Gild with Gum Ammoniac" www.geocities.com/CollegePark/Library/2036/gumammon.html
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 664
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 518
- George Savage, Art and Antique Restorer's Handbook, Rockliff Publishing Corp, London, 1954
- Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000