Candle

A candle gives light and heat.

It has a string in the middle. This string sits in wax.

When you light the string, the heat melts the wax. The melted wax moves up the string. It mixes with the air to make a flame.

As the wax burns, the candle gets shorter. The string gets shorter too.

Long ago, people used animal fat for candles. Some used wax from bees.

Beeswax was very expensive.

Today, we use candles for many things. We put them on birthday cakes. We also use them in churches.

Candles can make a room smell nice.

A candle is a tool that gives off light and heat.

It has a string in the middle called a wick. This wick sits inside a solid fuel like wax.

When you light the wick, the heat melts the wax. The liquid wax moves up the wick. This happens through capillary action, which is a way liquid moves through small spaces. The wax then mixes with oxygen in the air. This makes a flame. As the wax burns, the candle gets shorter.

Long ago, people used animal fat called tallow. Tallow was cheap but could smell bad. Rich people used beeswax instead. Beeswax burns cleanly without much smoke.

In the 1800s, people found a way to make paraffin wax. This made candles cheap for everyone.

Today, we use candles for many things. We use them on birthday cakes. We also use them in religious ceremonies.

Some candles even have scents to make a room smell good. Some people even used candles to tell time. These were called candle clocks.

A candle is a tool that provides light and heat.

It is made of a wick placed inside a solid fuel. This fuel can be wax or another material like tallow. Some candles even have a scent to make a room smell nice.

Candles have been used for over two thousand years. They were the main way to light rooms before electricity. Today, we use them for many special reasons. We use them on birthday cakes or in religious ceremonies.

They can also help when the power goes out.

There is a specific way a candle works. When you light the wick, the heat melts the solid fuel. This liquid fuel turns into a gas. This gas then mixes with oxygen in the air to form a flame.

The flame melts more fuel at the top. This liquid moves up through the wick by capillary action. This is a way liquid moves through tiny spaces. This process keeps the flame burning steadily. As the fuel burns away, the candle gets shorter.

People have used different materials for candles throughout history. In the past, many used tallow, which is animal fat. Tallow was cheap but often smelled bad.

Wealthy people used beeswax instead because it burned cleanly. Beeswax was very expensive to make. In China, early candles might have been made from whale fat.

In the 1800s, new ways to make candles were found. A man named James Young made paraffin wax from coal. This made high-quality candles affordable for everyone.

Making candles changed a lot in the 19th century. Before this, people had to trim wicks with scissors. These tools were called snuffers.

In 1825, M. Cambacérès introduced a special plaited wick. This wick curls into the flame to trim itself. This is called a self-trimming wick. In 1834, Joseph Morgan invented a machine for making candles. It could make about 1,500 candles every hour. This machine helped candles become a common item for all people.

Candles have been used for more than just light. In the Song dynasty in China, people used candle clocks.

These candles had marks to show the passing hours. This helped people tell time. In many cultures, candles are also used for symbols. People hold candlelight vigils to remember someone or a cause.

They are also used in many religious settings. From birthday parties to grand churches, candles remain a part of our lives.

A candle is an ignitable device consisting of a wick embedded in a flammable solid. This solid fuel is often wax, but it can also be tallow or other substances.

While candles primarily provide light, they can also produce heat or fragrance. They can even serve as a method for keeping time. Throughout history, candles were a vital source of indoor illumination. Today, although electric light is more common, candles remain important for functional, symbolic, and aesthetic reasons.

The combustion of a candle is a self-sustaining process. It begins when the wick is lit by an external heat source. This heat melts a small amount of the solid fuel. The melted fuel then vaporizes, turning into a gas. This gas combines with oxygen in the air to create a flame.

The flame continues to melt the top of the solid fuel mass. This liquid fuel moves upward through the wick via capillary action. Capillary action is the process where liquid moves through tiny spaces. This continuous flow of fuel maintains a steady flame. As the fuel is consumed, both the candle and the wick shorten.

Historically, the materials used for candles varied by cost and quality. Early candles were often made from plant materials dipped in animal fat. In Rome, people made true dipped candles using tallow or beeswax.

Beeswax was an expensive material used mainly by the elite and churches. Tallow was a much cheaper alternative, but it was less aesthetically pleasing. In China, early records from the Qin dynasty suggest candles might have been made from whale fat.

During the 18th and 19th centuries, spermaceti was used. This was a waxy substance from sperm whales that burned brightly without a bad smell. Eventually, colza oil and rapeseed oil became cheaper substitutes.

In the 19th century, several inventions changed how candles worked and were made. Before 1825, wicks often charred instead of burning, which produced black smoke. This required people to use "snuffers" to trim the wicks regularly.

To solve this, M. Cambacérès introduced a plaited wick soaked in mineral salts. This self-trimming wick curves into the flame to be destroyed by incineration. In 1823, chemists Michel Eugène Chevreul and Joseph Louis Gay-Lussac separated stearin from animal fats. This allowed for the production of harder, brighter candles.

Mass production also transformed the industry. In 1834, Joseph Morgan patented a machine that used a cylinder and a piston. This machine could produce about 1,500 molded candles every hour. This efficiency made candles affordable for the general public. In the mid-1850s, James Young discovered how to distill paraffin wax from coal and oil shales. Paraffin was a bluish-white wax that burned cleanly and had no unpleasant odor. By the late 19th century, companies like Price's Candles became global leaders in production.

Candles have served many purposes beyond simple illumination. During the Song dynasty in China, people used candle clocks to tell time.

These candles had hour measurements marked along the wax. In religious settings, candles hold deep symbolic meaning. Christian traditions include the use of Paschal candles and Advent candles.

In Jewish traditions, the yahrzeit candle is used for remembrance.

Even in secular life, candles are used for birthday cakes or candlelight vigils to protest or remember events.

Today, the candle industry is connected to various modern uses. While kerosene lamps and the 1879 incandescent light bulb caused the decline of candles as a primary light source, they found new roles. They are now used to create a soft or romantic ambiance. Scented candles have also become very popular in the 21st century. People use them for relaxation, such as during the COVID-19 pandemic lockdowns. Whether used for a religious ceremony or a simple birthday, the candle remains a versatile tool.