I'm having some trouble with printing from Photoshop and colours not matching once printed.
I'm helping out my girlfriend who runs a small illustration business where she draws up art pieces, scans them and sells them as prints.
Usually, all pieces are 100% black made out of lines and dots drawn with black finer liner pens and sometimes thicker pens like a Sharpie; an example of one of these pieces being:
My printing process for these 100% black pieces is simple: Scan it, clean it up in Photoshop (remove smudges, tweak colour levels etc.) and then print it onto thick card paper. At first I had trouble with black not coming out black when printed (more of a washed out grey), but then I tried printing the piece in "Grayscale" mode and that works perfectly:
However, this method fails completely when the art piece contains colour, I'll use this piece as an example:
I can't select the "Grayscale" print mode because the image contains actual colour, when printed the colour part doesn't match which is okay, I can tweak the colours in Photoshop and eventually get it to match as best as it can. The problem is that the black parts don't come out black, they come out a washed out grey.
I've spent days researching this problem, a lot of places say I need to replace my ink cartridges/clean or recalibrate the printer/get a new printer but surely I don't? The printer is perfectly capable of printing out perfect black (I know this from printing out in "Grayscale" mode), it's perfectly capable of printing out colour; the problem is that I can't print colour pieces in "Grayscale" mode.
I'm totally new to print, I come from a UI/web design/developer background so I know my way around the tools (Photoshop, Illustrator etc.), I'm just clueless when it comes to printing and what settings to use.
I've also seen the many articles such as this which tell me to use the CMYK colour profile, because RGB documents are meant for screens, and CMYK documents are meant for printing. I've tried this and it doesn't seem to change anything.
I think where I'm going wrong is when I click File > Print, I'm presented with this dialog:
I just use the default settings and hope for the best which doesn't work, I fear I'm overriding some other settings set elsewhere (CMYK colour profile). I can also click the "Print Settings" button which gives me these settings:
...Again I just leave these and hope for the best, I've tried changing them to a bunch of different values to; nothing works. So many settings and I can't find any resources which even mention these settings, never mind what values to set them as; maybe I'm going about this wrong?
For context the printer I'm using is the Epson Expression Home XP-405.
Any advice would be greatly appreciated.