What is the material used to coat (some might use the term 'lacquer') disposable aluminum containers in the food industry? And can it be removed in a safe way (for the environment) with 'home methods'?
I am not talking of the thin oxide layer that covers aluminum foil and most basic (shiny) containers; this layer can be tunneled through and a resistance measurement with an ordinary multimeter will show high conductivity even without scratching it.
I am in particular interested in thin, easily crushable containers like dessert cups (for example mildly acidic fruit mousse).
The coating appears different from that used in aluminum cans, but maybe it is just a different thickness.
There is no conductivity no matter how much I scratch the surface, and only when I punch through the material with the probes I get aluminum conductivity.
The label just say Alu 41 and my google-fu has been found lacking when it comes to the coating.
I googlefound the websites of two manufacturers that produce the containers like the ones I am interested in, like Aliberico, but I cannot find the name of the coating material, just a tradename (Alucoat) and some vague marketing descriptions.
This is the 'datasheet' I have found for Alucoat: https://www.paroc.com/-/media/uploaded-product-docs/2023/01/16/15/15/alucoat-en-us.ashx?dmc=1&ts=20230409t1527075538 and there is no mention of the material.
So, let's focus the question to this particular instance: what is the coating of Alucoat made of? Can it be chemically removed, for example to create small pads?