Here are three wines I have in bulk aging. I have heard that a wine is clear when you can clearly read print right through it. Does this only hold true for whites? I don't see how this would be possible with a dark red like a Shiraz. Even the raspberry looks clear in my top up bottle, but I cannot see through it in the large part of the carboy.
Left: Red Raspberry
Middle: Muscato
Right: Shiraz
Left: Red Raspberry
Middle: Muscato
Right: Shiraz