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Welcome to HP Customer Support

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  • Information
    Information regarding recent vulnerabilities

    HP is aware of the recent class of vulnerabilities referred to as “speculative execution side-channel attacks”. HP has released a security bulletin for systems with Intel x86 processor, and will continue to provide more information on other processors (ARM, AMD) as it becomes available. 

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HP Designjet Printers - Definition of Delta E

Issue:
What is the definition of Delta E as stated for Media and Ink Specifications for HP Designjet printers?
Solution
If there are two identical patches and one patches’ hue, saturation, or luminance value, is changed, Delta E is known as the point at which the standard observer in a very specific viewing environment can detect a change. If the Delta E value is multiplied by five, you will have a variation of five Delta E and so on. Again, this value is only useful for the specific viewing environment under which the test was done.
As a point of reference, most viewers find a Delta E of six or less to be an acceptable deviation in a commercial printing environment.

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Country/Region: Flag India

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