Thank goodness for soft pastel!! the only thing is that  the mat board's surfaces gets filled easily. So a little fixative is in other.
You have to be sooo careful, fixative darkens and kills the more delicate hues. So you have to go over the lighter areas.

Pastel on black mat board, what a wonderful idea!
I wanted this pair to really sign and jump! I thought that the read would really stand out of the black substrate, but I guess is was not going to be as easy as I thought.