As shown in this site: http://www.ihcworld.com/_protocols/special_stains/oil_red_o_ellis.htm

3. Glycerine Jelly Mounting Medium

Gelatin (Kitchen grade)    10 g       Distilled Water                60 ml

Glycerol                       70 ml Phenol                            0.25 g

Dissolve the gelatine in the distilled water using sufficient heat to melt the gelatine, add the glycerol and phenol. Mix well and transfer to a small capped bottle and refrigerate.

Thanks Subhash! I've tried. I think something is wrong in the amount of gelatin. Or in the procedure described. Have you tried this recipe? When you try to dissolve gelatin in water with mild warming, a dense foam appears. I don't think this recipe could be useful for a mounting medium.

I ever used a glycerol in 1X PBS in ratio 9 glycerol : 1 1X-PBS.

Last discussion; https://www.researchgate.net/post/Oil-Red-O-staining-protocol-best-mount-to-use#view=5d70b6e5a7cbaf121f69673c