I have contacted Rohm Haas last year in an attempt to bring some of the colored smoke to Superman. Here was the issue. The dye that was mentioned in a previous post is the material to use. It must be mixed 50/50 with a "standard" smoke oil. The minimum amount of dye that I could purchase was in 5 gallon tubs. I think the mixed figure I came up with was $50/gallon.

There are a few tricks to getting the right dye as well. Some of the colors come in various flash points, as low as 76 degrees. Still trying to make contact with the technical service rep about the proper selection.

To get black smoke, the Rohm Haas article has a mix that requires you to mix several of the colors together to get a dark gray (not fully black).

Steve Flaten