Discharge style indigo printing begins with a length of cloth dyed indigo. The pattern is then 'discharged out' by printing on the dyed goods with a discharging agent, usually an oxalic acid paste. The result is a white pattern on a blue background. Indigos printed in the discharge style were seen in England as early as 1805. By mid century, this technique was commonly used in Europe and America.

Note the wonderful picotage detail on this print.
An illuminated print has a bright chrome yellow or orange element usually on a dark background. Think of the yellow as school bus y
ellow and the orange as a good aged cheddar.
Here everyother pin dot is white--bleached out in the discharge style. A discharge paste containing lead chromate will bleach out the pin dot circle and then drop in the chrome coloration for the illumination. Registration on illumination is always perfect--the chrome coloration being part of the 'bleaching' paste.
The underside of both indigo prints.





