It is a funky toning technique named after China Hamilton.

The print is first toned in selenium. Strong ratio 1:5 or even 1:2. Washed then placed in this strange iodine bleach made from iodine crystals and methylated alcohol.
The print will turn completely red orange; then it is placed in a weak hypo until it begins to clear. The trick is to vary the bleach or ixer times to create spliting. Of course results will also depend on paper types.

AND YOU THOUGHT I WAS JUST MESSING WITH YOUR HEAD