Figure : Blurred lines
Humidity can cause ink to soak into the paper, making the lines blurred and fuzzy. Try the following:
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Check that your environmental conditions (temperature, humidity) are suitable for high-quality printing.
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Check that the paper type selected in the front panel is the same as the paper type you are using. To check on the front panel, use the View loaded paper key
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Try changing to a heavier paper type, such as HP Heavyweight Coated Paper or HP Super Heavyweight Plus Matte Paper.
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Select a paper type that is slightly thinner than the paper you have loaded; this will persuade the printer to use less ink. Here are some example paper types in ascending order of thickness: Plain Paper, Coated Paper, Heavyweight Coated Paper, Super Heavyweight Plus Matte Paper.
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If you are using glossy paper, try changing to a different type of glossy paper.
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Align the printheads.
