Term Liver of Sulphur comes from the time of Alchemy when sulphur
was considered a metal; so the terminology in this particular case is
appropriate. If you do not like term alloy, then term liver should
not be used as well.
To make a gun power you need Potassium Nitrate, not Potassium
Chlorate; addition of sugar will not do anything, you need charcoal
To make LIver of Sulphur using Potassium is not advisable, because
while it will blacken the silver, it is to strong to allow shading
and it is to active to store for reasonable period of time. That is
why in practical world we using sodium.
About salt exploding while melted with sulphur, you may get some
cracking noise which is hardly an explosion, but technique is
important of course. It is the same like combining acid and water,
one way it will get just warm, and another way it will explode.
And the last point, I am sure there are people who can manage a great
deal of harm to themselves just by trying to boil some water. It is
always assumed that basic familiarity of working with chemical is
present, otherwise even the elementary procedure can prove