39 minutes ago, KennethT said:I think the 10 hr boil also helps the broth emulsify the fat - I don't know how well that would work in the pc
It does not work in the pressure cooker. You need the agitation of the vigorous boil to mechanically support the emulsification process. What you can do is use the pressure cooker to break down the collagen for some time, and then do a final conventional boil to emulsify the fat. But having that huge pot boiling away on the stove for half a day and watching the progress is strangely satisfying ...