Orange/Red star

Composition

35  

Strontium nitrate

40  

Potassium perchlorate

23  

Sculpy

2  

Iron oxide (Red)

Description

Sculpy is a PVC based modelling clay - "FIMO" will also work, but is more difficult to mix.

Source: 

rec.pyrotechnics archive. Posted by Greg Deputy <gdep@gemstar.gemstar.com