Thanks! I accordion-folded the center, then scrunched up each corner and wrapped a rubber band around it. The dye is from a kit that I was given a year or so ago. Not sure if using it fresh would've given the deeper blue that I was hoping for.

I did another one last night (there'll be pics this afternoon sometime, when it's dry), and I think that if I want a dark blue on silk I'm probably going to have to go for another kind of dye.