02/08/2026
This is why i hold the deer heads as long as i do. This is the longest part of my system i use Degreasing.
1.) 1st day skin deer head and start the Maceration process.
2.) Maceration 5 to 7 days.
3.) Degreasing 3 to 8 weeks. "Deer head determine how long".
4.) Whitening 2 to 3 days
5.) Glue nose & teeth and touch up antlers( recolor ).
I know a lot of you kind of know this, but those that don’t know, and care how degreasing actually works and what is required to accomplish it correctly. I’ve always found this very interesting.
The below came from one of my college professors he was an archeologist, but a specialist in Taphonomy.
De-greasing bone and what happens…
By all appearances bone looks and feels like a solid, hard structure. In reality it is not solid, it is a microscopic framework. It has a molecular structure of collagen which holds the minerals in place, it also tends to have fats stored within the bony material.
Water molecules can and does travel throughout the bony matrix. Warmth allows the bone to swell and the microscopic openings get larger - this enables the fat to flow through the bone easier.
There are specific compounds in detergents called surfactants that break up fats (lipids) into extremely small particles.
You need to understand that bone has oil or actually grease within the matrix of its tissue not just on the surface structure but throughout it.
To rid bone of that grease you provide a surfactant that picks up the fat, molecule by molecule and transports it through the bone structure into the water/ detergent solution that surrounds the skulls body. At some point the detergent solution becomes saturated with oil and then the internal fat will no longer make its way out of the bone…at this point for the de-greasing to continue, it is time to change the water and detergent solution.
When this happens there is less fat in the solution and the transfer will start again.
This process may take weeks to months depending on how thick the bone is and the type of skull it is. If the bone is not thoroughly de-greased you will often see oil migrate to the surface at some point leaving gray or yellow spots on portions of the skull that are the thickest.
It is important that the bone is not subjected to high temps as this will cause the collagen to dissolve and this damages the integrity of the bony material. When this happens the bone starts to de-mineralize causing loss of surface smoothness and shine and it may even become brittle. Ideally the skull should be de-greased in the lowest temps to get the job done…..
De-greasing may also be done by using acetone or ammonia and water. However, detergents and water tends to be less expensive and extremely easy on bone.