Sigel IP150 InkJet Paper, Bright White, ultra white, printable on both sides, 100 g, A4, 500 sheets (Office supplies & stationery)
One may argue whether this paper is very different from other (normal) papers ... ... But if you are honest, then one also detects a difference. It is white, although not noticeably whiter than my normal printer paper, but had ultimately convinced me