Paper is fine for long haired hams
Wood shavings would be much worse,and pelleted substrate is inappropriate as it cannot be burrowed in.If some does seem a bit stuck on it should be easy enough to get off without hurting your hamster,but substrate doesn't bother hamsters if it is just stuck on and not tangled(wood shavings would tangle,plus they're also usually very rough and can cause allergic reactions so they're risky to use).