When I need more permanent notes, I use this other $13 ereasable notebook: "2019 Elfinbook Smart Reusable Erasable Spiral A5 Notebook Paper Notepad Pocketbook Diary Journal Office School Drawing Gift
4.8". https://www.aliexpress.com/item/32859074901.html?spm=a2g0s.9...
As for the previous one (single page scribble) then I found in the past that I usually have a new single page each day on my desk for tasks minor notes of that page and it's now replacing it - this is its main usage.
I seriously thought that was a joke listing at first, especially with the erase-by-microwaving picture. I could feel my gears turning as I realized it was legit.
the "black" frixion pen we use on elfinbook is a bit grey, not full black, but no problem seeing at all - like a regular pencil. a blue one actually looks even better, seems to have thinner strokes.
We only did 1 clearing cycle so far, and paper is back to practically white. but microwave was not enough, wet cloth worked better.