I try to reload 16mm bulk film into 110 cassette for my Pentax auto 110 film camera.
The currently available 16mm bulk film are low speed type (ASA 25), cannot be use
in pentax 110, which need at least ASA 100.
In a 1950 book published 1952 in Singapore there is a quote from American Photography
1939 March edition a formula which can increase film speed from ASA 8 to ASA 450, a film speed boost to 40x.
However one of his ingrediant Johnson & Johnson Swerl was discontinued long time ago
Any one knows any film speed booster developer, when can boost ASA 25 TO ASA 100