15. Hardness Temperature Cold Water Test Soft Ball 234° to 240° Forms a soft ball that flattens between fingers Firm Ball 242° to 248° Forms a firm ball that holds its shape until pressed Hard Ball 250° to 268° Forms a hard ball that holds its shape but is pliable Soft Crack 270° to 290° Separates into hard but pliable threads Hard Crack 300° to 310° Separates into hard, brittle threads that break easily
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