black color printing looking greyish

hi i noticed that when i try to print anything that has a black in it it comes out looking greyish but when i print the test page from my printer the black comes out looking black so i dont know what im doing wrong

on the bottom of the design page i see some thing saying

(Document color profiles: RGB: sRGB IEC61966-2.1; CMYK: U.S. Web Coated(SWOP) v2; Grayscale: Dot Gain 20%)

dont know if that help to assist in solving my problem

help please