Ketone Blue B (liquid) by Farbwerke vorm Meister Lucius &...
Ketone Blue B (liquid) by Farbwerke vorm Meister Lucius & Br
Ketone Blue B (liquid) by Farbwerke vorm Meister Lucius & Bruning, Hochst a./Main in Germany. One of a collection of colour dyes in bottles from the Colour Museum in Bradford, West Yorkshire, c.1900.