From a reader:
The time for the annual Chrism Mass is nearing and I would like to ask you and your readers a question about the various essences added to the olive oil during the sacred rites.
Inquiry. I am interested in knowing what mixtures various diocesan liturgists use in preparing the sacred chrism for the Holy Thursday Mass. Over the years we have used the Holy Rood mixture which is very popular here in America. I also remember a fine mixture from Steffen Arctander in the distant past which is no longer available. I am interested in hearing and learning what other products are used in other parts of the world. What essence is used in the papal Chrism Mass?
I have no idea.