(6) The room should have enough space for sample cases and for
separation of cases already inspected.
The room must have a container for disposing of waste materials.
(8) Egg grading charts should be attached to the wall over the egg bench.
There are two egg grading charts prepared by the USDA and available from the
Superintendent of Documents, Washington, DC. The two charts are "Illustration of the
Interior Quality of Eggs" and "Illustration of US Standards for Quality of Individual Shell
Eggs." You can use these charts as a guide when candling eggs.
1-13. EGG CANDLER
a. Setting Up the Candler. The egg candler (figure 1-4) should be mounted on
the candling bench so that it can be moved forward or backward, up or down, and so
that it can be adjusted to your height. If the candling room does not contain a candling
bench, the egg candler should be mounted on the chest used to store the egg
inspection equipment. Before candling the eggs, you should adjust the candler so that
you can stand erect with your elbows at right angles and avoid leaning.
b. Cleaning and Checking the Candler. The egg candler is disassembled in
the cleaning and checking process. A series of procedures is followed using a
screwdriver, replacement parts as necessary, and a clean cloth.
(1) Examine the electrical cord for frayed and/or bared wires. Check to see
that the candler is unplugged before cleaning and checking.
Remove the two front screws in order to remove the front plate (front
(3) Check the opening in the front plate where the egg is held up for
examination. It should be no larger than 13/16 inch (20 cm) and tapering to 5/8 inch (15
(4) Remove the lens. Check the lens for chips and cracks. If the lens is
cracked or spotted, you must obtain another one.
(5) Remove and examine the glass plate at the base of the light bulb. The
glass plate is normally frosted and blue in color. Dust the glass plate with a clean cloth
and check it to make sure that it is not cracked or chipped. If it is cracked or chipped,
you must obtain another one.