Originally Posted by Peter De Smidt
We have a number of people performing tests on the film to determine more development times. A lot of data has been gathered prior to our testing which indicates that an EI of 25 works well, although in some cases you may want to open up a further stop (12 ISO). We currently have no published data for Pyrocat HD, so you may need to use a stronger dilution or longer time (see Willie Jan's example above). If you are able to get good results, please let me know so that I can add the data to the Massive Dev Chart.