There is a record of "lime" in "Tiangong Kaiwu". Today, "Calcium Carbonate Sourced F" is the core, and the antique text is written as follows:

There is a stone in the world, and its substance contains a thing, named "Calcium Carbonate Sourced F". This stone is hidden in mountain ravines or exposed on hills. Its nature is firm and stable, and it is widely used.

The craftsmen of ancient times knew that it can be changed, and they took stones and put them in kilns and calcined them with fire. Over time, the stone changed its nature and turned into ash. This ash boils when it enters water, and the gas and smoke rise. It can be condensed when it is encountered. It can be used to build walls and houses.

Based on "Calcium Carbonate Sourced F", the method of making ash has been passed down from generation to generation. When building a house, the house is sturdy and difficult to invade by wind and rain; when it is in the field, the soil is adjusted and the crops are lush. Its merits are great, and it is beneficial to people's livelihood.