HP Designjet H35000 HP Designjet H35000 and H45000 Printer Series - Image Qual - Page 15

Wide Banding, Thin Banding

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Wide Banding Wide horizontal banding, sometimes referred to as "directional gloss banding" or "lawnmower banding," which may be caused by light reflecting differently off adjacent printed areas. Ink that is laid down when the printhead carriage is moving in one direction will have a different reflectance characteristic than ink laid down in the opposite direction. This effect varies with the viewing angle, and is more pronounced in darker images with higher ink saturation. To reduce or eliminate gloss banding, try these measures: 1. Use Plus mode - a special print mode designed to reduce the banding effect. Prints at a slightly reduced speed relative to printing without Plus mode. 2. Use a reduced gamut color profile - these color profiles restrict the gamut used, which reduces the color saturation in the printed image. If available, they can be downloaded from the RIP manufacturer's web site (see Choose a color profile on page 8). 3. Print with 4 colors instead of 6 to reduce the ink load and saturation. 4. Print in a higher quality mode - do not use Billboard mode; if printing in Production mode, try High Quality mode instead. This will reduce the print speed, which will reduce the visible difference between adjacent bands. 5. Print unidirectionally - this eliminates adjacent bands printed in opposite directions, but reduces throughput by 50 percent, since the printer is printing in one direction instead of both directions. 6. Laminate - applying an overlaminate to the print will reduce the banding effect and provide extra protection against damage. Thin Banding ENWW Wide Banding 11

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Wide Banding
Wide horizontal banding, sometimes referred to as “directional gloss banding” or “lawnmower banding,”
which may be caused by light reflecting differently off adjacent printed areas. Ink that is laid down when
the printhead carriage is moving in one direction will have a different reflectance characteristic than ink
laid down in the opposite direction. This effect varies with the viewing angle, and is more pronounced
in darker images with higher ink saturation. To reduce or eliminate gloss banding, try these measures:
1.
Use Plus mode — a special print mode designed to reduce the banding effect. Prints at a slightly
reduced speed relative to printing without Plus mode.
2.
Use a reduced gamut color profile — these color profiles restrict the gamut used, which reduces
the color saturation in the printed image. If available, they can be downloaded from the RIP
manufacturer's web site (see
Choose a color profile
on page
8
).
3.
Print with 4 colors instead of 6 to reduce the ink load and saturation.
4.
Print in a higher quality mode — do not use Billboard mode; if printing in Production mode, try High
Quality mode instead. This will reduce the print speed, which will reduce the visible difference
between adjacent bands.
5.
Print unidirectionally — this eliminates adjacent bands printed in opposite directions, but reduces
throughput by 50 percent, since the printer is printing in one direction instead of both directions.
6.
Laminate — applying an overlaminate to the print will reduce the banding effect and provide extra
protection against damage.
Thin Banding
ENWW
Wide Banding
11