New to the site and leatherworking in general.  I am going to do a leather rose for the better half and going to use purple and black.  She digs that kind of stuff.  She also does not like real flowers because they die.   The question is how to dye the petals purple on the main "meat" of the petals and fade them to black on the edges.  Bear in mind I do not have or have access to an airbrush.  I have tried watering down the black, maybe it wasn't enough, but it left a line without a fade.