What is another name for powdered sugar? Why might powdered sugar have a different fl avor and sweetness than regular granulated sugar? Below what size particle, in microns, do sugar crystals feel...

What is another name for powdered sugar? Why might powdered sugar have a different fl avor and sweetness than regular granulated sugar?

Below what size particle, in microns, do sugar crystals feel smooth and not gritty? Which dry sugar has most particles below this level?