Color specification mismatch (Artwork)
Sometimes, there might be a difference in the colors between the quote we gave you and the artwork you provided. For instance, our quote might mention "1/0 K" (which means one color using only black ink), while your artwork might be "4/0 CMYK" (using cyan, magenta, yellow, and black inks). This can affect how colors appear when printed.
If this happens we will either send you a new quote or will need to receive a new artwork data which will be according to the quote specification.
Rich-black
Sometimes your designer might use rich-black in your artwork data, so while it seems like it only uses white with black ink, in reality it uses all four CMYK colors (for example: 60% C / 60% M / 60% Y / 100% K).
Rich-blacks creates a more intense black color, especially useful for large solid areas or when you want a bold, impactful look in your printed materials. Using only K will often be percieved as “gray” in final print, rather than black, even with 100% K (black ink) coverage