HP 750 - Manual (Page 196)

9-18 Print Quality C4705-90000
Print Quality Problems
The following is a list of print quality problems that you may find when printing in certain
conditions.
Cockle
Description
The surface of the media wrinkles in saturated area fills.
Causes
Ink media interaction during the drying process. The affected medias are:
D Translucent Bond.
D Natural tracing paper.
D Japanese tracing paper.
D Vellum.
D Coated paper (saturated colors).
D Opaque bond.
The worst case occurs in cold and dry conditions.
Corrective Actions
D Print in multiĆpass print modes.
D Set the lightness to lighter" to reduce the amount of ink used.
Coalescence
Description
Uneven area fill produced by accumulations of ink, showing up as a reptile skin pattern.
Causes
The chemistry of the ink attracts drops and produces local ink aggregates of a different color.
Affects all area fills but the most sensitive are the secondary colors. The worst case is with
green (yellow + cyan).
Corrective Actions
D Plot in an interlaced print mode thus increasing the number of passes over the media .
D Set the lightness to lighter" to reduce the amount of ink used.