Glycerin is one of the basic components of an embalming fluid alongside, Formalin, Ethanol, Common Salt, Water, Thymol and H&E dyes.
Since the formalin reduce the natural color of the preserved specimen, glycerin enhances the colour of the specimens in the long term display and used in Kaiserling solution
Since the formalin reduce the natural color of the preserved specimen, glycerin enhances the colour of the specimens in the long term display and used in Kaiserling solution
it can improve the staining ability of certain techniques such as staining nervous tissue with silver carbonate: https://www.tandfonline.com/doi/abs/10.3109/10520295809111816?journalCode=ibih1
it also act as a blocking buffer in immunohistochemistry
https://www.abcam.co.jp/ps/pdf/protocols/immunocytochemistry_and_immuofluorescence.pdf
Formalin has a tendency to make tissues hard and less life-like and the role of glycerine is to make anatomical tissue more supple
Adding Glycerin to prestvative along with formalin helps in preserving the colour change to certain extent and also to maintain the shene in preparation of museum specimens
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