How do you throw a dust?

[S. J. Digriz]

Can dusts (e.g. dust of appearance) be thrown like, say, a tanglefoot bag? If so, what is the range increment.

If not, how is it dispersed, and from what point does it spread out?

[Gavmania]

I would use the "Throw Splash Weapon" rules.

[taks]

Yeah, I think Gavmania is right. You can probably assume the dust is in a little pouch that easily breaks open when it hits the ground (like a sack of flour, for example) or whatever the target is.

[Dave Justus]

Dust of Appearance makes anything within 10' of the user visible etc.

It is not a thrown object with a range increment. You fling it into the air (or presumably blow it into the air if it is the hollow bone tube variety) to get the 10' radius of effect.

[TOZ]

Amnesia Dust to the face!

[S. J. Digriz]

Dave Justus wrote:

Dust of Appearance makes anything within 10' of the user visible etc.

It is not a thrown object with a range increment. You fling it into the air (or presumably blow it into the air if it is the hollow bone tube variety) to get the 10' radius of effect.

Does it affect the user? They are, technically, within a 10' radius.

[deuxhero]

Pocket Sand Dust of Sneezing and Choking!

[Mark Thomas 66]

Like this

[Azothath]

sometimes you just have to follow the rules in the item description and with Dust of Appearance it falls a bit short.
Usually (at a minimum) spell effects appear in an area adjacent to the caster and I'd assume that here. So mark off a 10ft radius sphere adjacent to the user(caster). IF the user wants to be in the area of effect then he can be in it.
Consider it a glitterdust with a 10ft range.

As a GM you could rule that it has a range of 0ft and would affect the user. Just inform your player BEFORE he buys it.

Lastly, a GM could give it a range increment (5 or 10ft). Then it is just a matter of an attack roll versus the AC of a square (or target) with range modifiers. Usually this mechanic is used with bags of stuff that explode when they hit.