How exactly does Deep Wounds work?

FineDog

Like if I have two points in it, a bleed lasts one second longer. If a regular bleed does x damage over 5 seconds, does it essentially do 1.2x over 6 seconds now? And if a regular bleed does x damage over 0.5 seconds, it now does 3x over 1.5 seconds? And so on and so forth?

SummonerNR

The BLEED PER SECOND (and FYI, it actually does only half of that each “tic” but tics at twice a second) remains the same.
Only the DURATION increases, so you will get additional “tics” of damage being done against them.