Quote Originally Posted by Kirk Keyes View Post
#1 and #2 both relate to coarser grain which results in higher speed. #4, slower addition rate, results in higher speed as well, this is due to more time to form larger, more perfect crystals?

With my peristaltic pump, I can go from addition rates of about 3 ml/min (with my current tubing size) on down to about any excruciatingly slow addition rate you can stand to wait for. Is there a practical limit as to how slow the addition rate can be made?

Kirk;

You can run the rates as high or low as needed by the formula or as needed related to concentration of the reactants.

A faster emulsion with slower addition is also related to lower contrast. This is due usually to the formation of a more polydisperse emulsion with coarse and fine grains lowering the contrast, but the coarse grained emulsions increase the threshold speed. Of course, digestion and ripening both change this but if all else were constant, this is one way to alter speed and contrast at the same time.

PE