Less is More with Thread

Less is More ---Does black space count as white space?  I tried to evaluate whether my card is CAS according to the examples on the page, but I'm still not certain.  However, I'm posting my "thread" card, anyway.   I rather like it.   (It's a tall card that will require a special envelope.)

The thread is copper, marking the flight of the coppery butterfly.  Copper is repeated in the heat-embossed sentiment.