Katrina Van Tassel meets Little Red Riding Hood

I always loved this dress in Tim Burton´s movie the Sleepy Hollow, therefore I was very happy when I found black and white striped cotton fabric. Last week I finally finished the dress, but found something unpleasant about the fabric, it is not from my usual source of fabrics and it seems it is not in a quality I am used to, because I am afraid the black colour will be running.