Difference between revisions of "Autofluorescence"
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The ability of a material to fluoresce without the addition of any fluorochromes. Some organic and inorganic materials autofluoresce by absorbing energy from incident radiation then reemitting the radiation at a longer wavelength. The intensity and wavelength distribution of the emission can change as a material ages. Some typical autofluorescent colors are: | The ability of a material to fluoresce without the addition of any fluorochromes. Some organic and inorganic materials autofluoresce by absorbing energy from incident radiation then reemitting the radiation at a longer wavelength. The intensity and wavelength distribution of the emission can change as a material ages. Some typical autofluorescent colors are: | ||
| − | - [ | + | - [[Protein|Proteins]] or [[carbohydrate|carbohydrates]]: bright white to pale yellow |
| − | - [ | + | - [[Linseed%20oil|Linseed oil]]: green to yellow when fresh, intensity decreasing with age |
| − | - [ | + | - [[Dammar|Dammar]] and [[mastic|mastic]]: pale yellow to green, may be dark orange if oil is present |
| − | - [ | + | - [[Shellac|Shellac]]: orange (varying shades depending on original color of shellac) |
| − | - [ | + | - [[Zinc%20white|Zinc white]]: whitish yellow |
| − | - [ | + | - [[Titanium%20dioxide|Titanium dioxide]] or [[lead%20white|lead white]]: deep purple |
| − | - [ | + | - [[Calcite|Calcite]]: purple |
| − | - [ | + | - [[Indian%20yellow|Indian yellow]]: bright yellow |
| − | - [ | + | - [[Polyethylene|Polyethylene]]: whitish purple |
| − | - [ | + | - [[Cellulose%20nitrate|Cellulose nitrate]]: purple |
[[File:00.321 BT front uv 1.jpg|thumb|Statue under ultraviolet light]] | [[File:00.321 BT front uv 1.jpg|thumb|Statue under ultraviolet light]] | ||
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
Revision as of 09:23, 8 January 2014
Description
The ability of a material to fluoresce without the addition of any fluorochromes. Some organic and inorganic materials autofluoresce by absorbing energy from incident radiation then reemitting the radiation at a longer wavelength. The intensity and wavelength distribution of the emission can change as a material ages. Some typical autofluorescent colors are:
- Proteins or carbohydrates: bright white to pale yellow
- Linseed oil: green to yellow when fresh, intensity decreasing with age
- Dammar and Mastic: pale yellow to green, may be dark orange if oil is present
- Shellac: orange (varying shades depending on original color of shellac)
- Zinc white: whitish yellow
- Titanium dioxide or Lead white: deep purple
- Calcite: purple
- Indian yellow: bright yellow
- Polyethylene: whitish purple
- Cellulose nitrate: purple
Synonyms and Related Terms
primary fluorescence; autofluorescent
Additional Images
Statue under normal lighting conditions
Statue under ultraviolet light
Authority
- Richard C. Wolbers, Nanette T. Sterman, Chris Stavroudis, Notes for Workshop on New Methods in the Cleaning of Paintings, J.Paul Getty Trust, Los Angeles, 1990 Comment: Source for most fluorescent colors in list
- External source or communication Comment: G.Osmond "Accelerated Deterioration of Artists Oil Paints: An Assessment Involving Ultraviolet Fluorescence Microscopy" ICOM Preprints Washington 1993 p.239-247