Heatbath/Park Metallurgical supplies Group I salts composed of nitates/nitites for use as steel tempering or quenching media. All salts are completely water soluble, easily washed and have similar high heat transfer rates and heat capacity. Group I salts come in powder form with pink dye for identification and organic anticake. Also available without dye and anticake in a briquette form under the trade name PARKETTES.
Group II salts are neutral salts of the chloride family that operate in the higher temperature ranges. Stable and non-oxidizing.