Thread: What is the additive they put in molten aluminium to make it more viscous when creating Foam aluminium?

Hello Forum, I have a question
And i would like an answer.

what additive do they put into molten aluminium to make it more viscous when they are making cellulose aluminium??

I allready know that they put Calcium Carbonate to make bubbles, but there is this ingredient they put into molten alu before they put The Caco3


Or if you are a pro please share the whole Process of making Foam aluminium.
i would like a how to guide / step by step!
Thank you -appreciate your help
Si,