Hi i'm the painter's beginner and i have some serious problem. I paint with acrylics on artisic rough paper.. and everything was ok. The paint was of the color and brightness i wanted it to be.But now when i put it on particular places of canvas it's too bright, even white sometimes like some kind of light reflection. Generally i'm not happy with such effect and i can't figure out how to solve this problem.

If i don't make myself clear here are some pics:

http://www.margot.webd.pl/images/h.jpg

and a little zoom in

http://www.margot.webd.pl/images/h2.jpg

Please help me if you know the solution so that i could finish my work .

Thanks in advance