Method and apparatus for establishing exposure and developer set points for color image formation

An apparatus for creating multiple color images including a charge retentive surface having an exposure response relationship according to:

• Exp.sub.pr (10%)/Exp.sub.pr (50%)>2.2
• where:
• Exp.sub.pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface;
• Exp.sub.pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.

A printing machine for creating multiple color images including:

• a charge retentive surface having a voltage saturation level;
• an imaging device which records a first latent image on said charge retentive surface;
• and
• a first developing device which develops the first latent image with a first layer of non-black toner particles, said imaging device recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for said charge retentive surface and the first layer of non-black toner particles maximum mass.

A printing machine for creating multiple color images including a charge retentive surface having an exposure response relationship according to:

• Exp.sub.pr (10%)/Exp.sub.pr (50%)<2.2
• where:
• Exp.sub.pr (10%) represents a first exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface;
• Exp.sub.pr (50%) represents a second exposure value to which said charge retentive surface is discharged to a percentage difference between the dark decay voltage of said charge retentive surface and the saturation voltage for said charge retentive surface.

A method of creating multiple color images, including:

• recording a first latent image on a charge retentive surface having a voltage saturation level;
• developing the first latent image with a first layer of non-black toner particles;
• and
• recording a second latent image at a second exposure level with the second exposure level being a function of the voltage saturation level for the charge retentive surface and the maximum mass of the first layer of non-black toner particles.

A method of setup for a multicolor printing including:

• depositing a first non-black toner layer on a surface;
• depositing a second non-black toner layer on the first non-black toner layer;
• and
• increasing the second non-black toner layer mass to form a composite color having a saturated hue.