What is the richest black that Pantone have for Logo printing? I want something to appear really black and not tinted (Something similar to the registration black in CMYK which is a 100% of the 4 colors).
I heard though that printing on 100% from all colors will damage the paper (it will be over-soaked or so I guess). Moreover, I am not sure if I can use Pantone+CMYK in this case?
Typically one does a Pantone Black so it's a solid ink. As a solid ink, at 100%, any Pantone black will not have the "greying" tendency CMYK black may have. So really any Pantone Black will be more solid than a CMYK black.
For CMYK reproduction, a Rich Black can be favorable- i.e. 40C40Y040M90K, or similar (talk to the printer for Rich Black breakouts - this is only an example. Every print provider may have their own rich black formula.)
You can do CMYK+Spot.. It will cost much more as a 5 color run though. So you'd be increasing production costs for everything with the logo on it. And even with 5 color you may still bound by ink limits at times.
You can never do 100C100M100Y100K.. Not ever. Stock simply will not hold that much ink. It smears and runs and can't be printed. Ink limits are there for technical reasons and not arbitrarily set.
CMYK (rich black) or a straight Pantone are good enough for every major billion dollar corporation. I doubt you really need a 5 color run for a logo.
Be aware that because a screen or application may make 100C100M100Y100K appear deeper, that is just on screen with light. It's not the same as on paper with ink. Anything less that that will always look "less black" on screen due to the nature of color profiles. And depending upon your exact color settings the variation can be small or great.
If the result is to make the black really 'pop' you could assign a varnish plate - this could be a matt or gloss (or other effect) - the degree of 'pop' could be enhanced by the the paper stock choice. Talk to your print provider on options.
