Mystery blue powder from the 1920s for polishing crystal?
August 21, 2012 9:33 AM Subscribe
What is this mystery substance? In an episode of Upstairs, Downstairs
, Rose and Daisy are cleaning crystals from the chandelier. Rose explains that "...then you give the pieces a wipe-over with this powder blue before the final polish and that gives the glass an extra sparkle." Screengrab here.
posted by mimi to Home & Garden (9 answers total) 1 user marked this as a favorite
It's at about 23:15 from this episode
, season 5/episode 5, if Netflix is helpful. Apparently it's also good for mirrors? I'm not Googling correctly and/or Mrs. Beeton doesn't cover this.