Unlike limestone, calcium hydroxide—a zero-carbon precursor for lime and cement production—emits only water when heated in a kiln to produce lime. Inspired by this, a UCLA Samueli School of ...

The best reaction for use in our hand warmers was the 'slaking' of lime. It generated enough heat for our purposes, and involved chemicals (water, calcium oxide and calcium hydroxide) that are ...

In the past, people used sodium silicate for water glassing. These days, pickling lime, also known as calcium hydroxide, is the go-to choice because it's easier to use and get a hold of.