Pigment Name
PB66-Indigo
Pigment Type
synthetic, organic
Chemical Name
2,2’-Bis(2,3-dihydro-3- oxoindolyliden)
Chemical Formula
C16H10N2O2
Properties
Indigo is a deep blue pigment, almost violet dye that can be laked as a pigment.
Permanence
Indigo is fugitive. Indigoid Blue is the famous blue dye used in many blue jeans and other denim products, famous for the way it fades! Although a few paint manufacturers offer a genuine indigo color based on PB66, it should be used only for applications that are not permanent, or where the color is required for historic reasons. Most paint manufacturers replicate this historic hue with other more permanent pigments.
