That is absolutely valid question.
But no, this is not for negatives (you would probably scratch them in the process or get some fibres on them). This Drying book is intended (as far as I know) for drying fibre paper prints (which like to curl-up when drying, contrary to MC papers).
Side note: my only advice to get your negatives straight after developing is drying them in not too dry air (so the drying is slow) and hang them with some weight so they are straight during the drying process. I dry my films in our shower (when not in use ) and have no problem with negatives curling up.
hope this helps