Why does wide-format photo printer often require RGB color forms?
One sentence reply: the final result of wide-format printing is closer to the color you see on your computer.
In most cases (without proofing) it will satisfy your hopes. From the point of view of the shopping malls, whether they are earthen workshops or professional manufacturing companies, this is a natural result. Because they can’t tell whether the customer is using the same CMYK color space they use, for the unprofessional customers, this problem is mostly impossible to communicate.
So why is it closer to using RGB? First look at the results of the customer’s own conversion to CMYK.
Although the inkjet of wide-format photo printer is in the form of CMYK, the CMYK format and the RGB format are all device-dependent. That is to say, the same is the CMYK form, and the colors may be different under different device spaces. That is, the same picture, after you turn to CMYK, the effect you see and the output of his device may be different, this is the foundation.
Specifically, if you have converted to a CMYK form on your computer, the effect you see on your computer is the effect of CMYK conversion to the RGB appearance of the screen (in most cases, if you don’t make corrections, it is sRGB space) . But which CMYK color space you choose, they don’t know. After they receive your file, there is also a transformed representation of the CMYK space to the RGB space. Assuming that the RGB space is the same as you, it is also RGB. But since the CMYK space and yours are probably not the same, the transformed colors you see are now different from what you see.
This way they don’t know what the color of hope you are at this time. Let alone the color that they output to the output device is the same as you want – that is, the whole process is completely uncontrollable.
Look at the file is the status of RGB.
In the current digital products on the mall (mainly the display screen), most of them are the space of sRGB. The files you see on the computer are the results of the original files in RGB format in the sRGB space. There is no transformation. After the change, after you sent it to the inkjet company, according to the daily experience, the inkjet company also used sRGB as the computer’s visualization space (if the soil workshop, they use the acquiescence space, it is also sRGB. If it is a professional company, in the large format inkjet printer expectation. Most of the applications to customers may be sRGB space, and must be set to sRGB space). Then the manifestations they see will be very close to the manifestations you see.
At this time, they only need to do their own color management, to ensure that the color of their inkjet output is the same as the color they see on the display screen of sRGB. Then the final result is fundamental to the color you see on your computer, that is, your ultimate hope. This should prevent many misunderstandings and troubles.