How to draw a candle sketch is as follows:

First is the basic shape of the candle. Fill in some picture for the outline sketch. The following coloring for the candle continue to paint more beautiful details of the color can be painted.

Candle, is a daily lighting tool, mainly made of paraffin wax, in ancient times, usually made from animal fats. It can be burned to emit light. In addition, the use of candles is also very wide: in the birthday party, religious festivals, collective mourning, red and white celebrations and other activities also have an important use. In literature and art works, candles have the symbolism of sacrifice, dedication.

Modern generally believe that candles originated in the primitive era of the torch, primitive people put fat or wax on the bark or wood, something like a kind of coating, bundled together, made of lighting torches.

There are also legends in the pre-Qin and ancient times, some people put the wormwood and reed tied into a bundle, and then dipped in some grease ignited for lighting, and then there are people to a hollow reed with a cloth wrapped around the inside of the beeswax filled with ignition.

The main raw material of candles is paraffin (C?H?), paraffin is made from the wax fraction of petroleum by cold pressing or solvent dewaxing, is a mixture of several high-level alkanes, mainly twenty-two alkanes (C22H46) and twenty-eight alkanes (C28H58).

Contains about 85% carbon and 14% hydrogen. The added auxiliary materials are white oil, stearic acid, polyethylene, flavor, etc. The stearic acid (C17H35COOH) is mainly used to improve the softness, and the specific additions depend on what kinds of candles are produced.

Easy to melt, the density is less than water, difficult to dissolve in water. Melt into liquid state by heat, colorless and transparent and slightly volatile by heat, can smell paraffin unique odor. When cold, it solidifies into a white solid, with a slight special odor.

We see the candle burning is not paraffin solid combustion, but the ignition device will wick ignition, the heat released to make the paraffin solid melting, and then vaporized, generating paraffin vapor, paraffin vapor is combustible.

Candle is lit when the initial burning flame is small, gradually become larger, the flame is divided into three layers (outer flame, inner flame, flame center). The center of the flame is mainly candle vapors, the lowest temperature; inner flame paraffin wax burns insufficiently, the temperature is higher than the center of the flame, containing carbon particles.

The outer flame is in full contact with the air, the flame is the brightest, burning fully, the highest temperature. Therefore, when a matchstick is quickly placed flat into the flame and removed after about 1 second, the part of the matchstick in contact with the outer flame is the first to turn black.

At the moment of blowing out the candle, you can see a wisp of white smoke, with a burning match to light this wisp of white smoke, you can make the candle rekindle, so it can be proved that the white smoke is a paraffin vapor condensation produced by the cold solid tiny particles.

When the candle burns, the products of combustion are carbon dioxide and water. Chemical expression: C25H52 + O2 → (ignition) CO2 + H2O. combustion phenomenon in the oxygen bottle for the flame bright white light, heat emission, the wall of the bottle has a water mist.