Are there other combinations of getting 100% black in CMYK?

Question

Seal

Is there only one 100% black in CMYK, is it C=75 M=68 Y=67 K=90 or are there other combinations of 100% black?
and why 100% black is C=75 M=68 Y=67 K=90 and not C=0 M=0 Y=0 K=100

Answer 1

Pure black 0:0:0:100 is used for small text and line art, process colors may not match when printed and will be washed out. Sometimes even for black and white photographs, when a neutral gray color is important, but you are not sure about the color reproduction of the printing press.
Composite black depends on the paper, inks, and printing device. Somewhere you need more yellow, somewhere more blue. Too many paints also can not be done, otherwise the paint does not dry well. Usually, the sum of all values ​​\u200b\u200bis up to 350.