Help with Iron-on design

[DisneyWorldMimi]

I have a design. That i have been meaning to put on a t-shirt.

The t-shirt is black and the background of the design is black. Should I take off the black background or leave it as is?

 

[Kite16510]

I'm a big fan of less vinyl. I'd probably take it off unless it was really integral to holding the design together. Or unless the blacks were not really compatible in shade. You could do a little test on a tiny piece to see.

I usually do sublimation, but sometimes I'll do some vinyl and I'm never usually happy with the vinyl because it is so hot. But with sublimation you're usually doing polyester and that's pretty hot anyway.