Looks like the source the article is based around is https://www.diyphotography.net/develop-film-at-home-with-a-jager-bomb/ https://www.diyphotography.net/devel

Looks like the source the article is based around is https://www.diyphotography.net/develop-film-at-home-with-a-jager-bomb/ https://www.diyphotography.net/develop-film-at-home-with-a-j..., which itself is a write-up of https://www.youtube.com/watch?v=5_Oja2mpYqg https://www.youtube.com/watch?v=5_Oja2mpYqg.