hardeningsalt
nounUK /ˈhɑːdənɪŋ sɔːlt/
US /ˈhɑːrdənɪŋ sɔːlt/
A special salt that helps things like soap or metal become hard.
The soap maker added hardeningsalt to the mixture so the bars would hold their shape.
RELATED WORDS
OTHER MEANINGS
2. A salt used in metalworking to make a metal surface harder.
The blacksmith dipped the blade in hardeningsalt after heating it.
3. A salt mixture used to firm up food during processing.
The pickles stayed crisp thanks to the hardeningsalt in the brine.
4. Any salt that speeds up the setting of a material like plaster or cement.
A pinch of hardeningsalt made the plaster set faster.