Their own FAQ states they whiten the rolls with chlorine dioxide and hydrogen peroxide. Chlorine dioxide is elemental chlorine free but still a chlorine compound, so the paper is chemically whitened and cannot be 100% natural. On the fibre they are honest: the same Which? lab test that failed Naked Sprout found Who Gives A Crap genuinely 100% bamboo as claimed, no virgin hardwood. So the mark against them is the bleaching, not the fibre. 1/5.
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