I recently made my first pinhole camera and started taking photos with it. It's a Illy coffe can camera with a 0.35 mm pinhole aperture. I am using an old pack of Ilfobrom FB IB2 photo paper. It's 17.8 x 24 cm so it fits nicely inside if I cut it to three strips of 17.8 x 8 cm. Developing process is:
Ilford PQ Universal 1+9. It takes about 20 - 30 seconds for the images to appear.
Home made stop bath. I use a 7 g/L citric acid solution producing a ~2.3 pH solution which is close to the commercial Ilfostop solution. I leave the photos inside for about 10 seconds.
Ilford Rapid Fixer 1+9. I leave the photos inside for 2 minutes.
Washing the photos in the sink, periodically changing the water.
What is causing the cloudy overlay and how to prevent it?