go buy RGB cartridges
A standard printer will have 4 colors. Cyan, Magenta, Yellow, and Black (CMYK)
It depends on the file's color mode (RGB or CMYK), and the output printer. Most computer monitors are RGB (Red, Green, and Blue) color based, as are the majority of printers used by most non-professional users. As such, the file you're working in should be RGB, and rendered/printed as RGB to ensure what you see on screen will look like what's printed on paper. Print publishing graphics have always used a 4 color process, CMYK (Cyan, Magenta, Yellow and Black). In addition to the file being CMYK, the output printer should also be CMYK. Many higher-end printers are now CMYK. Sharp's new Aquos Quattron monitor technology is a step toward finally making monitors 4 colors instead of the CRT based 3 colors they were originally designed to handle.
The name of the toner cartridges depends on the brand of your printer, although in rare cases, generic cartridges will suffice. Do you have an inkjet printer or a laser printer? What model is it? My advice is to find your manual and read about your printer and the corresponding cartridge needed.
When talking about color printer toner the letters CMYK refer to the colors Cyan, Magenta, Yellow, and Key all part of the toner itself. Key is almost always a black, however it can be other colors at times.
If you're printing the image on your desktop printer, use RGB--those printers will convert anything else to RGB, then to CMYK. If you're printing it on a wide-format inkjet printer like a Roland, Mutoh or VUtek, or you're sending it to a printing plant to be printed on an offset or flexo press, use CMYK if you're not using spot colors, and Pantone for the spot colors.
To print white ink on black paper, you will need a printer that has white ink capabilities. These specialized printers use a white ink cartridge instead of the traditional CMYK colors. Make sure to adjust the settings on the printer to ensure the white ink is printed on the black paper effectively.
Printers use CMYK instead of RGB because CMYK is a subtractive color model that is better suited for printing on physical surfaces like paper. CMYK stands for cyan, magenta, yellow, and key (black), and these colors are mixed together to create a wide range of colors on printed materials. RGB, on the other hand, is an additive color model used for electronic displays like computer monitors and TVs.
It depends on the file's color mode (RGB or CMYK), and the output printer. Most Computer Monitors are RGB (Red, Green, and Blue) color based, as are the majority of printers used by most non-professional users. As such, the file you're working in should be RGB, and rendered/printed as RGB to ensure what you see on screen will look like what's printed on paper. Print publishing graphics have always used a 4 color process, CMYK (Cyan, Magenta, Yellow and Black). In addition to the file being CMYK, the output printer should also be CMYK. Many higher-end printers are now CMYK. Sharp's new Aquos Quattron monitor technology is a step toward finally making monitors 4 colors instead of the CRT based 3 colors they were originally designed to handle.
PC = process coated ec = euro coated
sepia cmyk 0%, 60%, 81%, 63%
CMYK - EP - was created on 2010-05-28.
The underlying color model in Photoshop is neither RGB nor CMYK but LAB. It has the widest gamut, which means it can hold more color values than any other model. Of the two other models, RGB has more color values than CMYK does. When you convert from RGB to CMYK, the program first "maps" the RGB values into the LAB colorspace. It then maps the LAB values into the CMYK colorspace. Now, for REAL entertainment...take a pure RGB blue, or a pure RGB green, and attempt to map it into CMYK colorspace. It doesn't work at all. Red maps fine, but the other two go straight to hell.