Welcome. I have a signature on a piece of paper which has been done with blue pen. It has been scanned at resolution of 600x600 dpi. I want my signature to look like the original one after printing. Is it possible? There is a plenty of tutorials how to do that with normal black pen or how to do transparency etc. I need signature which looks like originals blue pen. Thank You. Sorry for my english
Getting a specific printer to print good color is potentially a complex subject. Are you Mac or PC? Are you using ICC profiles for color management? What kind of printer are you using? Your printer may come with its own set of ICC profiles, but depending on the printer, images may need to be printed with certain settings, on specific paper matched to the printer and print settings. Also, you may need to both calibrate your monitor to see more accurate color, and then make color adjustments to the scan in Photoshop. In this forum context, it is very difficult to be more specific on what you should do to get color-accurate prints on your printer.
"ICC" stands for "International Color Consortium," an open, vendor-neutral color management system which functions transparently across all operating systems and software packages. Basically, this means that when you create an image in Photoshop with an ICC profile in it, and you print that image using the ICC profile supplied with your printer (usually with a specific paper stock) then you get the color you expect. This of course, assumes that your monitor is also calibrated and has its own ICC profile, so you're reasonably confident that what you see on screen is accurately depicting the color image as well.
If you're using Photoshop in a design or creative suite, then fire up Bridge, and set Edit>Color Settings for all your Adobe applications. If you only have Photoshop and not a design or creative suite, then in Photoshop go to Edit>Color Settings. This might send you to the manual, or to reading up on color management for more understanding. But if you want your prints to look like the original, this is the road you should probably travel.
BTW, not all printer drivers use ICC profiles. I don't have any experience with the Brother J315, but I'm sure you can find out whether it does by reading the documentation. Good luck!