<p>Hello Photo. net community<br>
Hope you can help me on this. I have just started developing my own black and white films at home. I use Paranol S but I follow the developing times for Rodinal. I notice sometimes the negatives have some stains on the top. I try as much as I can, to get the temperature right, agitation and time. The problem is that sometimes, this problem occurs and sometimes it does not. In the examples below, I used Rollei Retro 400S and it was processed at 20 degrees for 22 minutes, with 10 seconds agitation each minute.<br>
<img src="http://68.media.tumblr.com/d4ffff5ba59d0dea2d0dc49fecfaa132/tumblr_oj0jemTN2G1sq6fbqo1_1280.jpg" alt="" width="1280" height="826" /></p>