Hi Tarja! nice solarigrafia it remind me to ur first but in that one, the threes are plenty of leaves ;) Thanks for giving us the chance to compare. I have noticed these lines in some of mine solargraphs and i think it has to be with the light reflections inside the can. Could be cause the glossy surface of the paper was working as a mirror. Rareness the lines turning to the opposite direction. I cant found any explanation by the moment, let me think...they give to this particular solarigrafia some kind of music