Revealer

A Revealer was a magical device used to render invisible writing visible. It had the appearance of an ordinary Muggle eraser, although it had a bright red colour.
==History==
Hermione Granger bought a Revealer in Diagon Alley sometime in or prior to the summer of 1992. On 1 February, 1993, upon her first inspection of Tom Riddle's old school diary, she used her Revealer, along with the Revealing Charm to detect any hidden writings.
==Behind the scenes==
*A Revealer is featured in . It can be used to a reveal a clue to obtain extra content from J. K. Rowling. Its appearance differs slightly from its description in the book, as it is depicted as being similar to a white eraser in the website, though it is possible that there are more than one style of Revealer and it may merely be one not revealed in the books.
==Appearances==
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Category:Mrises Hermione-Jean-Granger's Possessions
Category:Invisibility
Category:Real Magical Objects