Oddly enough, the definition of PAINT, is key to qualifying compliant shipments of dangerous goods. While PAINT does lean towards being liquid, it also has heavy viscosity properties which make its‘ use difficult in liquid packaging systems. Therefore, for the purposes of packaging and/or shipping, this definition is critical to insure compliance with use and/or shipping. In a recent publication of the DOT when asked for the current PAINT definition, they responded that, "Paint is not defined in 49 CFR 171.8. Section 173.173 identifies PAINT as the proper shipping name for paint, lacquer, enamel, stain, shellac, varnish, liquid aluminum, liquid bronze, liquid gold, liquid wood filler, and liquid lacquer base. The proper shipping name PAINT-RELATED MATERIAL describes paint thinning, drying, reducing or removing compounds."
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