A method to schedule color print jobs to one or more configurable color printers is described. The method comprises forming a reaction mixture comprising at least one substituted or unsubstituted phenolphthalein, at least one substituted or unsubstituted primary hydrocarbyl amine, and an acid catalyst; and heating the reaction mixture to a temperature of less than 180\xb0 C. This minimizes poor vehicle driveability that would otherwise result from operation in the lash zone. The system is adapted to isolate the image of each participant from the background. The restrictions are presented to the user.