Professional Drum Scanning – What You Need to Know to Be the Smartest Person In The Room

Drum Scans

Color space is determined by the methodology used to create the colors within a file. The most popular of those are:
RGB
CMYK
LAB or a similar space such as YCC
RGB is gaining popularity in the graphics output community. RGB colors are “mixed” using values stated in levels instead of percentages. i.e. 0 to 255 rather than 0% to 100 %. This colorspace can be thought of as a “Transmissive” colorspace as RGB devices use light to image instead of pigments. As your levels increase towards 255, your values get lighter.
Black, medium grey and white in RGB are created from the following mi

Black Medium Grey White
RGB RGB RGB
0 0 0 127 127 127 255 255 255

As you can see, the closer to white (more light) the higher the number.

RGB is a “Device Independent” colorspace, meaning that regardless of the device printed to, a given color in a file will always be made of the same color “mix.”

CMYK is a long standing “standard” but is not a device independent colorspace. This is due to the many variables in the CMYK world. GCR (Grey Component Removal) and UCR (Under Color Removal) can result in the same perceived color being reproduced with several different combinations of Cyan Magenta and Yellow, depending on the level of the Black. These mixes are determined by paper stock, press conditions, inks used, etc. One CMYK file built for a web press, can yield drastically different results when sent to a sheet-fed press, or an inkjet printer. Each of these devices prefers different levels of GCR, or UCR. Creating a CMYK file for one, does not mean it will perform as expected on the other. Because CMYK files are “calibrated” to a specific device, they are referred to as “Device Dependent”. CMYK values are measured in percentages from 0% to 100%. The higher the number, the more ink is laid on the paper during printing. Because each press and paper combination can yield different results, there is no exact formula for a rich black, middle grey, or any other color except for “paper white” which is:

White
C M Y K
0% 0% 0% 0%

There are several formulas that are used throughout the industry as approximate guidelines. These can be obtained from your printer.

Our Professional Drum Scanning is provided in a RGB colorspace file unless otherwise requested. All scanners actually see in RGB, but a CMYK scan is converted on the fly through either hardware or software algorithms. By providing you with an RGB scan, we are allowing you or your service provider to convert the file to CMYK based on their individual requirements, leading to a higher quality product

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