While I was writing the new book I remembered the terrible days when I ruined three sets of beautiful white sheets trying to recreate Bluo from my nana’s day. The idea behind blueing is that the blue pigment exchanges with the yellow or grey pigment which makes white sheets look dull after lots of washes. I believe that the optical brighteners and other chemicals left in sheets when using supermarket laundry powders adds to this dullness.
So I bought some Prussian Blue pigment from the local art supply shop and set about mixing it with baking soda. But it took a while to get the dose quite right which didn’t happen until I had streaked all my sheets bright blue!
This is so easy to make, and I do recommend you use it within a few months and do not add to your wash until the rinse cycle, and only when the bowl is full, or you may get streaks. And if you have a front loader dissolve the powder in a cup of warm water before throwing it in.
Mix 3 cups of baking soda with half a teaspoon of Prussian Blue powder (you can get this pigment from art supply stores). 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. If you hang your sheets out in direct sunlight, this will work even better. This is great for white shirts and underwear too.
You can also buy ready-made Blueing Powder on my website here.