Share 'Lava Dye'

As someone who is patiently waiting for the new lava source to get up and running I was wondering about Color Dye for the Lava.  In the past I got mine from Magna Tower as well.  I know you can use food coloring for the liquid but not the lava.  I still have some Dye left but do not know what the Magna Tower dye is actually made of.  What about new sources for the Dye?  And Maybe someone could pr…