>>3110388While Lomochrome Purple is a pretty flexible film when it comes to exposure, I honestly dont mess with development a whole lot. Ive always had it developed as a 400 speed film, though I did shoot my first roll at 200 ISO + developed at 400. This is very unscientific, but quickly looking at some of the photos from that first roll compared to subsequent rolls, shooting it at 200 ISO seems to give somewhat deeper reds and yellows, while shooting + developing at 400 ISO gives the sky and other blues a more rich blue-green / turquoise color. The primary purple colors of the film dont appear to change a whole lot with exposure, and are generally deep and rich. Your experience may vary, of course.