values study

values study
Originally uploaded by dibujandoarte

i'm working on this image by Tisi Garofalo, making a values study. it took me about 6 hours to draw and fill it, using squares to help me draw the contour (i'm made to), but then i've filled it with pencils seeing at the printed image and it's still unfinished. i hope it won't take me another 6 hours to complete it. (it's only a 25 x 35 cm drawing...)