Candling
 | This article relies largely or entirely on a single source. (June 2014) |
Candling is a method used in
egg. The method uses a bright light source behind the egg to show details through the shell, and is so called because the original sources of light used were candles.[citation needed
]
The technique of using light to examine eggs is used in the egg industry to assess the quality of edible eggs.[1]
-
A non-fertile chicken egg, with only a round yolk sac -
A non-viable fertilized chicken egg, with a thin blood ring encircling the yolk -
A fertilized chicken egg, 11 days old, with blood vessels surrounding the yolk
In plants
This technique can also be used to assess the quality and development stage of certain translucent plant
stratified. Care must be taken during candling, as drying or overheating will kill the developing seeds.[2]
In lutherie
In
lutherie, candling is sometimes used to check the thickness of the soundboard in various places, especially on lutes and historical guitars. This is especially necessary because these instruments have soundboards which vary in thickness, for instance the area where the rose is carved.[3] It is also used to check for any flaws in the wood, or to check how tight a joint is, for instance on the centre seam of the soundboard.[4]
Traditionally, a candle would be used, hence the name, but usually nowadays a modern light is used, as this is less of a fire risk.
References
- University of Illinois Extension. 2019. Retrieved 2012-06-06.
Eggs are candled to determine the condition of the air cell, yolk, and white. Candling detects bloody whites, blood spots, or meat spots, and enables observation of germ development. Candling is done in a darkened room with the egg held before a light. The light penetrates the egg and makes it possible to observe the inside of the egg. Incubated eggs are candled to determine whether they are fertile and, if fertile, to check the growth and development of the embryo
- ^ "Pacific Bulb Society - Lilium seeds". Pacific Bulb Society. Retrieved 20 February 2016.
- ^ "The Lute Society: Building Lute Original Methods".
- ^ "Building the Top Plate of the Flattop Guitar". Archived from the original on 2010-10-09.
External links
- Pacific Bulb Society – Information about candling lily seeds
- Candling and grading manual for shell eggs – 1951 publication on egg candling by Kansas State Board of Agriculture
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