So working with colloidal silver is safer than interrupting a light cycle?...err...doesn't sound right.
"Colloidal silver is a suspension of submicroscopic metallic silver particles in a colloidal base. Long-term use of silver preparations can lead to argyria, a condition in which silver salts deposit in the skin, eyes, and internal organs, and the skin turns ashen-gray. Many cases of argyria occurred during the pre-antibiotic era when silver was a common ingredient in nosedrops. When the cause became apparent, doctors stopped recommending their use, and reputable manufacturers stopped producing them. The official drug guidebooks (United States Pharmacopeia and National Formulary) have not listed colloidal silver products since 1975."
Seen that site already. I cured an ear infection with this stuff.
Here is how it does what it does. Tricks not stresses...
What happens (in terms that I can just about understand) is that the silver molecules bind themselves to copper molecules in the bud sites of the plant.
Copper is used for ethelyne production by the plant which is used for bud production in female plants.
By binding up the copper molecules and making them unavailable, the Colloidal Silver suppresses the ethelyne production and effectively tricks the plant into thinking it is male.
Again, it has nothing to do with stress, and if the plant didn't have a genetic inclination towards being a hermie, then the seeds will not have the hermie trait either.
To use Colloidal Silver you simply spray the selected plant (or bud or branch of a plant) with colloidal silver before putting it under 12/12 lighting. Repeat the application until male flowers appear.
The fact that you can treat a single bud or branch on a plant and ONLY that area will produce male flowers allows you to harvest pollen and keep flowering the parent plant as a female.
Simply remove the affected branch as the male flowers are reaching maturity and stick it in a flower vase while the pollen sacs ripen, that way you control which flowers get pollinated.