Hi everyone,
since I'm new I'll go with a brief introduction first.

Being a compulsive drawer since the age of four, I recently decided to give my talent a try and develop a web comic.
Needless to say I'm going nuts trying to settle on a comfortable format; pondering whether put less details for the sake of immediacy or keep the accuracy to increase the characterization and so on.

I'm also starting to find difficult to focus and avoid motivation loss... but whatever.

Other than this big project, I keep working to improve my skills, mainly focusing on coloring tasks (and here it comes my problem and the reason of this topic.)
I must say I never had a great relationship with colors, If possible I usually skip the coloring part entirely; so it came with no surprise that the first time I actually had to print a very colored poster for a sampling of wine (I draw using a graphic tablet and photoshop), I found myself dealing with the huge problem of the non-correspondence between colors on screen and final product on paper.

Being very aware that this is a site about drawing, I intend to take full advantage of the many resources at my disposal, but just this time I'm checking if, by chance, any of you can address me to a short compendium to quick learn how to manage colors on PC (when the final opera is meant to be printed.)

Any help or tip is much appreciated.
Thank you all for the attention

The god of blank background layers, sheets of paper and empty canvases may bless you all with inspiration and endless need to sketch ideas.

I sympathize with your dilemma. A lot will depend on the settings of your monitor in terms of colour, and the piece itself, how it was scanned or photographed, as well as the printer you use to create the final product and also the paper that you print on. Everything will have varying impact on the difference between what you see on screen to what you actually get.

In my experience, if something is very important, it is better to take it to a professional to have them scan and print it. I've found that way the colours stay truer and more what is expected. I know this isn't always the case when you want to try something at home, so experimentation is the key here. You may not be able to change your printer, but you can try some different papers. There are places online where you can by paper specifically for printing images which may help you.

Good luck with it.

Thank you,
yesterday I brought the prints to the commissioners, they liked it anyway; but yes, if I am to do stuff like this again I better calibrate my laser printer or take bigger jobs.
Since it was a small amount of coupons and posters, this time I went to a photocopy shop, instead of a print shop; but if I were to print, let's say a thousand coupon or so, it could be worth the price to actually print using offset printing instead of laser printing.

The man at the shop said that, since with offset printing they got to create a specific printing plate for every image, the costs could grow over the 200 euros (250 dollars) just for making it, but for the actual printing, the number of copies doesn't affect your price that much, see as you pay more or less just for the paper.
Make a copy with a laser printer, instead, costs you between 80 cent and 1 euro a sheet for an A3 and 50 cent for an A4; so if, like in my case, you print around 50-100 sheets, the total price will be around 80- 100 euros, which is way more cheaper than 200 plus the paper cost; but as you print more it becomes less and less convenient.

Just for the sake of information, I post the two version of the poster
the file and the printed version, they are in low quality, but the color distortion is evident

This it not the forum to try to get good advice on this, you need to go to a photographic forum or get professional help.

This is a brief synopsis of the problems you face getting consistent and correct printed colours from a pc.

First your monitor has to be calibrated applying a monitor profile.

Second you have to choose the colors you work in, printers use cmyk to print jobs, photoshop tyypically use RGB. This refers to the distribution of colors across the spectrum present in the image. and if you send an rgb image to a cmyk printer a shift occurs.

Next you need to try to obtain the printers profile, this compensates the colors for the print machine the printer uses. You need to be aware that photoshop can be set up to profile in more than one place, and its possible if you arent careful to apply either more than one profile, or apply a profile more than onese, to double profile as it were. A magenta cast on a print is a sign you could be double profiling.

You also need to ask what resolution the printer wants and convert all your images to this.

Many people are completely unable to achieve consistent and correct color, its that difficult and specialist. Work closely with your printer on this.

Good luck