The deal with making stuff (especially magic stuff)

[UmbraLux]

OK, thanks - I understood your example, but I didn't think you were allowed to have enchanted items with a strength of effect that was greater than your Lore rating.

The quote InFerrumVeritas mentions begins on YS280.

It may also be worth mentioning potions are any "fire and forget" enchanted item - not necessarily a bottle of some liquid to be drunk.  In the fiction, Harry uses one as

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a hanky releasing a beam of sunlight

and

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Guard appears to use them as runes

.  On the forum, suggested uses have been anything from tattoos to combat thaumaturgy.

"Potions" are very flexible.   

[Arcteryx]

Thanks for the great example, taking the time and explaining it well - did everything to expand my understanding Cheers!