At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
The developing solution was a potion, that, when used in the developing of photographs, allowed the pictures to move. It will apparently even work with Muggle film, as the Muggle-born wizard Colin Creevey learned during his first year, much to his delight.
- Harry Potter and the Chamber of Secrets (First mentioned)
- J. K. Rowling's official site (Mentioned only)
- Harry Potter: Hogwarts Mystery (Mentioned only)
Notes and references
- Harry Potter and the Chamber of Secrets, Chapter 6 (Gilderoy Lockhart)
- JK on moving photographs, official site, accessed 29/7/2011
- Harry Potter: Hogwarts Mystery, Potions lessons