1. "Teacher, you are like a candle, illuminating our way forward and our future in the dark."
2. "You are the candle in our life, burning yourself selflessly, illuminating our way forward and keeping us from getting lost."
3. "Teacher, your teachings are like candles, which warm our hearts and light up the world of knowledge."
4. "Your wisdom and care burn like a candle, providing us with light and warmth, so that we can thrive."
5. "Thank you, dear teacher. You are like a candle, always by our side, bringing us light and hope. "
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I. Introduction of Candles
Candle is a daily lighting tool, mainly made of paraffin. In ancient times, it was usually made of animal fat. It can burn and glow. In addition, candles are widely used: they are also very important in birthday parties, religious festivals, collective mourning, weddings, funerals and other activities. In literary and artistic works, candles are symbolic of sacrifice and dedication.
In modern times, it is generally believed that candles originated from torches in primitive times. Primitive people painted things like fat or wax on bark or sawdust, and then tied them together to make torches for lighting.
Second, the nature of the composition?
The main raw material of candles is paraffin wax (CH), which is made from waxy fractions of petroleum by cold pressing or solvent dewaxing. It is a mixture of several higher alkanes, mainly n-docosane (C22H46) and n-octacosane (C28H58), containing about 85% carbon and 14% hydrogen.
Accessories added include white oil, stearic acid, polyethylene, essence, etc. Among them, stearic acid (C 17H35COOH) is mainly used to improve the softness, and the specific addition amount depends on what kind of candles are produced.
Related contents of candles
1, main classification?
There are many kinds of candles, which can be generally divided into two categories according to the purpose of use: daily lighting candles (ordinary candles) and handicraft candles (special purpose candles). Lighting candles are relatively simple, usually white stick candles. Craft candles can be subdivided into many types, including jelly craft candles and incense craft candles.
Generally, due to the addition of ingredients, various colors (such as birthday candles) are displayed, and shapes are also made into various forms (such as spirals and numbers). ) according to the needs, it can be novel, decorative, ornamental and functional.
2. Special candles
After special treatment, some emergency boxes have emergency lights, but most Japanese emergency boxes have candles. This is because the specially treated candles are not afraid of the influence of humidity and have reliable quality. In addition to lighting, they can also be used as kindling to judge oxygen content.
Specially treated candles can burn continuously for about 4 hours, which is longer than most emergency lights can provide.