Plays with Fire

Hey all, I've read many times here that water/moisture can cause Al compositions without boric acid to spontaneously ignite and I was wondering if the same was true for Mg compositions?

If so, would boric acid prevent this in Mg, like it does in Al?

Also, can dextrin + water be used as a binder for compositions containing Al (and compositions containing Mg if the answer to my first question is yes) if the proper amount of boric acid is used, or should one still not purposely add water?

Much Thanks,
Plays with Fire


P.S. I searched for the words magnesium and water together and got no matches.

Okay, I've just spent a long while searching the internet in general, as well as in this forum, and still cannot find the information I'm looking for; not quite sure this is the correct forum but Chemistry and Formulas both seemed even more off - Anyway...

I currently have no acess to mesh screens, and would like to know about what mesh my compositions are. I have a simple spaghetti strainer, but still don't know what mesh it is either. So, it would be very useful if someone could tell me the various meshes of the following compounds, for comparison:
1. Table Sugar
2. Baking Flour

Also, if you can think of anything else an american would have around his house (mounds of duct tape and thick plastic wrap don't count !) then I'd like to know their meshes too.

Ignorantly yours,
Plays with Fire