Several wire coat hangers - the stronger the hanger the better they will support the weight of the Cheese Cloth
Cheese Cloth: There isn't a prescribed amount since it varies upon personal taste and the size of Spectres that you are making. You can't go wrong with several yards of it though!
One container of RIT dye (white): This is what makes the Ghosts glow under blacklight. If you don't need your decorations to glow, you can ignore any of the steps that pertain to the RIT dye.