I have a question about using a gerund as an adjective for a noun. I think the right name is "Present-Participial Adjectives ". I want to refer to a "material" that is being "injected" just right now. So, if I say "injected material" it means that the material has already been injected. If I use "injecting material", it means that the material is the subject and it is injecting something else (completely nonsense). And if I use "being injected material", it seems off and not common to me as I searched it through the internet, and I could not find many examples of it.
I would be grateful if you send me your suggestions.
Best regards, Masoud