As in use charcoal to make it blacker when it starts getting faint.. At least that was what we did when I was in secondary school.. .i guess they use whiteboards now

Thanks hermionegranger . I read the book

I think blurryface actually care

Finally, somebody said it

yeah but sucrose is table sugar.. .just like how NaCl is table salt

I think sugar is sucrose

I see what you did there