Feathers

Hi Everyone:
At our quilt group this month we learned how to do a reverse applique which I'm having a ton of fun with. My question?

I am signed up for the Batik exchange so want to make sure I do what I'm suppose to do as this is the first swap I've done. My question:

I would LOVE to do a reverse applique block with the batik but I could not find plain or even marbled black batik in any of the stores I shopped in to find the batik fabrics I'm using. I went to every WalMart within 100 miles from us, I went to quilt shops (3), JoAnn Fabrics, Fabricland and Mill Ends Fabric store but none of them had the black so I decided to use just plain black cotton. Would you Batik lovers feel cheated if I made my blocks with this black cotton? I can find another pattern to make my Batik blocks using all Batik but I love this reverse applique and I love the blocks, too. Please be honest in your opinion so I can decide what I will do. Thank you so much.