Prussian blue is a mineral dye, discovered about 1800 and put to
good use by cotton and wool printers as the decades went on.
It produces a variety of blues, maybe a little warmer and certainly more
adaptable to multi-color printing technology than its
rival blue indigo.
The color was novel in the U.S. in the 1840s. Quiltmakers
And so do we.
Always looking for reproductions.....
Edyta Sitar Laundry Basket Quilts