Faded pages are the toughest thing to research. To make it more confusing,
three spells use faded salil's writ pages, the left side of page 60 (Insipid
Weakness), the right side of 90 (Mana Sieve), and the left side of 288 (Mind
Wipe). For my guildmate at level 51 with a 149 research skill unfading these
is not trivial yet, though making the level 44 spells is trivial. They may
or may not sell to a vendor for different prices, I haven't had the chance
to check this yet, and if not, then there may be no way to tell them apart
while faded.

Lozi Candiman ~Hand of Chaos~ CT