In a previous message Paul wrote:

"It was as if the motting was inversely proportional to the time spent in the presoak. I will pursue this further. I will also start using metaborate in my presoak again."

For Pyrocat-HD I recommend the use of sodium carbonate in place of metaborate. The addition of metaborate to the pre-soak water should work fine with pyrogallol based developers but Pyrocatechin and metaborate are not compatible and the addition of even a minute quantity of metaborate may result in a significant reduction in the develoment energy of Pyrocat-HD.

Sandy King