Wendyl's Factsheet: Bluing Powder
In Nana’s day she would blue her sheets by using a blueing powder which she added to the final rinse. She would have been lost without her Bluo, as it was called. These days we can no longer get it so I set about creating my own recipe for it. You will need to get the pigment Prussian Blue from an art supply store.
This is truly amazing stuff. It isn’t a soaker, instead it creates a pigment exchange where the blue pigment swaps with the grey/yellow pigment which is making your whites grubby looking.
Mix 3 cups of baking soda with half a teaspoon of Prussian Blue powder. Store in an airtight container.
For one set of sheets, add a teaspoon of the mixture to the final rinse of your wash, making sure the bowl is full first. If you’re washing more than a set of sheets, increase the amount of blueing powder accordingly.