How can I ensure that the pages I print in black and white with pdflatex are recognized as black and white by a printer in my PDF and not as mixed from CMYK colors? My question arises because my copyshop explicitly advised me to check whether my black is really a black color or mixed from colors.
Here they said it works without changing anything in macTeX Store black and white information in a generated pdf
But I am using TexStudio. Does anybody has any experience with that?
