Brown detection: Grading eggs on shell color

How to separate brown and white eggs

Moba egg grading, packing and processing machines are packed with technology. Some designs are worth further investigation as they represent crucial customer value. In this series of articles, we will be zooming in on these "hidden gems." Moba egg graders can not only grade eggs on weight but also on shell color. In this article, you can read all about how Moba's brown detection can separate white and brown eggs.


Eggs come in all kinds of shapes, sizes, and… colors. The color of the eggshell depends on the breed of the hen. A hen with red earlobes will likely lay brown eggs, whereas a hen with white earlobes will produce white eggs. Except for the difference in the eggshell color, brown and white eggs taste the same and have the same nutritional value.

Often packing stations are required to produce a uniform color for packed eggs. This can be purely for esthetic reasons or simply because different eggs are processed at the same time and need to be separated by color. To do the separation by hand would be time-consuming and nearly impossible. That is why Moba has developed the automatic brown detector, which is available as an add-on in Omnia graders equipped with a blood detector.

How does Moba's brown detector separate white and brown eggshells? It is all about the measurement of reflection. White light is reflected by the eggshell and transmitted to color-sensitive sensors. Then the brown detector compares the different color levels on a scale from 1 to 10. If an egg is categorized as 1 this indicates a white egg, 2 means a very light brown egg and so on till 10, which is a very dark brown egg. By fine-tuning the software it is possible to determine per packing lane which shade of brown is required. This color data is then added to the product information. For example, one product (programmed on one or more packing lanes) can pack white eggs while another product (positioned on other packing lanes) is packing all brown eggs. Another example is removing the extremes of light or dark eggs from batches to create a nice uniform color. Using a bar where numbers represent the different brown shades, a selection can be made of which shades of brown are allowed in a product.


Do you want to know more about Moba's brown detector? Please don't hesitate to contact your local sales representative.


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