Comments: Exposure is generally with a Weston II and Zone System. PVC pipe spacers are used to put the 35mm material in the center of a 450ml tank, thinner spacers in the top/bot of
120mm keep the reel from rattling about during inversions. Inversions every 15 seconds per Hutchings’ Book of Pyro. N- and N+ developments are about 1 minute (-/+) from this 11 minute
base. If someone is interested in a heavier than "normal" stain (almost brown), the Pyro mix can be "aged" for 8-10 hours before using.