Paper is one of the things that we use in our daily life knowingly or unknowingly and used papers most of the time reach your dustbin, I think we can dye used papers into white sheets of paper and resell them. Cost of dyeing is negligible as it can be done by water and acrylic paint or even with coffee. So, the selling price can be flexible. But if it's that easy someone should've been doing it already, either i didn't notice it being done and even if it is done is it profitable to do it still?
Thanks!
Thanks!
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