I bought a vintage bulk film loader off the local gumtree site. It had film in it which the seller had no knowledge or information about. I took a guess at what it might be and shot a few experiments with the sprocket rocket. It is horribly damaged film which I think could be 30/40 years old (Ilford HP5 Safety 400). I managed to get some images. It was liberating to not really care or think too much.