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Sparkler
A sparkler is a type of hand-held firework that burns slowly while emitting bright, colored sparks. It burns in high temperature (over 1000°C), so it can be very dangerous. Sparklers are particularly popular with children. In the United Kingdom, a sparkler is often used by children at bonfire and fireworks displays on Guy Fawkes Night, the fifth of November, and in the United States on Independence Day. They are called ''phuljhadi'' in Hindi and are especially popular during the Diwali festival. Composition Sparklers are generally formed around a thin non-combustible metallic wire, about long, that has been dipped in a thick batter of slow-burning pyrotechnic composition and allowed to dry. The combustible coating contains the following components; multiple ingredients can be used: * Metallic fuel, main reactive ingredient; type of metals influences the color of sparks; size of particles influences shape and size of the sparks ** Aluminium, magnesium or magnalium, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sparklers Moving Slow Shutter Speed
A sparkler is a type of hand-held firework that burns slowly while emitting bright, colored sparks. It burns in high temperature (over 1000°C), so it can be very dangerous. Sparklers are particularly popular with children. In the United Kingdom, a sparkler is often used by children at bonfire and fireworks displays on Guy Fawkes Night, the fifth of November, and in the United States on Independence Day. They are called ''phuljhadi'' in Hindi and are especially popular during the Diwali festival. Composition Sparklers are generally formed around a thin non-combustible metallic wire, about long, that has been dipped in a thick batter of slow-burning pyrotechnic composition and allowed to dry. The combustible coating contains the following components; multiple ingredients can be used: * Metallic fuel, main reactive ingredient; type of metals influences the color of sparks; size of particles influences shape and size of the sparks ** Aluminium, magnesium or magnalium, for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sparkler
A sparkler is a type of hand-held firework that burns slowly while emitting bright, colored sparks. It burns in high temperature (over 1000°C), so it can be very dangerous. Sparklers are particularly popular with children. In the United Kingdom, a sparkler is often used by children at bonfire and fireworks displays on Guy Fawkes Night, the fifth of November, and in the United States on Independence Day. They are called ''phuljhadi'' in Hindi and are especially popular during the Diwali festival. Composition Sparklers are generally formed around a thin non-combustible metallic wire, about long, that has been dipped in a thick batter of slow-burning pyrotechnic composition and allowed to dry. The combustible coating contains the following components; multiple ingredients can be used: * Metallic fuel, main reactive ingredient; type of metals influences the color of sparks; size of particles influences shape and size of the sparks ** Aluminium, magnesium or magnalium, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firework
Fireworks are Explosive, low explosive Pyrotechnics, pyrotechnic devices used for aesthetic and entertainment purposes. They are most commonly used in fireworks displays (also called a fireworks show or pyrotechnics), combining a large number of devices in an outdoor setting. Such displays are the focal point of many cultural and religious Celebration (party), celebrations, though mismanagement could lead to List of fireworks accidents and incidents, fireworks accidents. Fireworks take many forms to produce four primary effects: noise, light, smoke, and floating materials (confetti most notably). They may be designed to burn with colored flames and sparks including red, orange, yellow, green, blue, purple and silver. They are generally classified by where they perform, either 'ground' or 'aerial'. Aerial fireworks may have their own Air propulsion, propulsion (skyrocket) or be shot into the air by a Mortar (weapon), mortar (aerial shell). Most fireworks consist of a paper or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diwali
Diwali (), also called Deepavali (IAST: ''Dīpāvalī'') or Deepawali (IAST: ''Dīpāwalī''), is the Hindu festival of lights, with variations celebrated in other Indian religions such as Jainism and Sikhism. It symbolises the spiritual victory of ''Dharma'' over ''Adharma'', light over darkness, good over evil, and knowledge over ignorance.Jean Mead, ''How and why Do Hindus Celebrate Divali?'', Diwali is celebrated during the Hindu calendar, Hindu lunisolar months of Ashvin (month), Ashvin (according to the Hindu calendar#amanta, amanta tradition) and Kartika (month), Kārtikabetween around mid-September and mid-November.''The New Oxford Dictionary of English'' (1998) – p. 540 "Diwali /dɪwɑːli/ (also Diwali) noun a Hindu festival with lights...". The celebrations generally last five or six days. Diwali is connected to various religious events, deities and personalities, such as being the day Rama returned to his Kosala, kingdom in Ayodhya (Ramayana), Ayodhya with h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dextrin
Dextrins are a group of low-molecular-weight carbohydrates produced by the hydrolysis of starch and glycogen. Dextrins are mixtures of polymers of D-glucose units linked by α-(1→4) or α-(1→6) glycosidic bonds. Dextrins can be produced from starch using enzymes like amylases, as during digestion in the human body and during malting and mashing in beer brewing or by applying dry heat under acidic conditions (pyrolysis or roasting). This procedure was first discovered in 1811 by Edme-Jean Baptiste Bouillon-Lagrange. The latter process is used industrially, and also occurs on the surface of bread during the baking process, contributing to flavor, color and crispness. Dextrins produced by heat are also known as pyrodextrins. Starch hydrolyses during roasting under acidic conditions, and short-chained starch parts partially rebranch with α-(1,6) bonds to the degraded starch molecule. See also Maillard reaction. Dextrins are white, yellow, or brown powders that are partially o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Perchlorate
Potassium perchlorate is the inorganic salt with the chemical formula K Cl O4. Like other perchlorates, this salt is a strong oxidizer when the solid is heated at high temperature, although it usually reacts very slowly in solution with reducing agents or organic substances. This colorless crystalline solid is a common oxidizer used in fireworks, ammunition percussion caps, and explosive primers, and is used variously in propellants, flash compositions, stars, and sparklers. It has been used as a solid rocket propellant, although in that application it has mostly been replaced by the more performant ammonium perchlorate. KClO4 has a relatively low solubility in water (1.5 g in 100 mL of water at 25 °C). Production Potassium perchlorate is prepared industrially by treating an aqueous solution of sodium perchlorate with potassium chloride. This single precipitation reaction exploits the low solubility of KClO4, which is about 1/100 as much as the solubili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrotechnic Composition
A pyrotechnic composition is a substance or mixture of substances designed to produce an effect by heat, light, sound, gas/smoke or a combination of these, as a result of non-detonative self-sustaining exothermic reaction, exothermic chemical reactions. Pyrotechnic substances do not rely on oxygen from external sources to sustain the reaction. Types Basic types of pyrotechnic compositions are: * flash powder – burns very fast, produces explosions and/or bright flashes of light * gunpowder – burns slower than flash powder, produces large amount of gases * solid propellants – produce large amount of hot gases, used as sources of kinetic energy for rockets and projectiles * pyrotechnic initiators – produce large amount of heat, flames, and/or hot sparks, used to ignite other compositions * gas generators – produce large amount of gas, either high volume at short time (for actuators and ejection charges, often using solid propellants) or controlled flow rate (e.g. chemical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strontium Nitrate
Strontium nitrate is an inorganic compound composed of the elements strontium, nitrogen and oxygen with the formula Sr( NO3)2. This colorless solid is used as a red colorant and oxidizer in pyrotechnics. Preparation Strontium nitrate is typically generated by the reaction of nitric acid on strontium carbonate. : 2 HNO3 + SrCO3 → Sr(NO3)2 + H2O + CO2 Uses Like many other strontium salts, strontium nitrate is used to produce a rich red flame in fireworks and road flares. The oxidizing properties of this salt are advantageous in such applications.MacMillan, J. Paul; Park, Jai Won; Gerstenberg, Rolf; Wagner, Heinz; Köhler, Karl and Wallbrecht, Peter (2002) "Strontium and Strontium Compounds" in ''Ullmann's Encyclopedia of Industrial Chemistry'', Wiley-VCH, Weinheim. Strontium nitrate can aid in eliminating and lessening skin irritations. When mixed with glycolic acid, strontium nitrate reduces the sensation of skin irritation significantly better than using glycolic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonium Perchlorate
Ammonium perchlorate ("AP") is an inorganic compound with the formula . It is a colorless or white solid that is soluble in water. It is a powerful oxidizer. Combined with a fuel, it can be used as a rocket propellant called ammonium perchlorate composite propellant. Its instability has involved it in accidents such as the PEPCON disaster. Production Ammonium perchlorate (AP) is produced by reaction between ammonia and perchloric acid. This process is the main outlet for the industrial production of perchloric acid. The salt also can be produced by salt metathesis reaction of ammonium salts with sodium perchlorate. This process exploits the relatively low solubility of NH4ClO4, which is about 10% of that for sodium perchlorate.Helmut Vogt, Jan Balej, John E. Bennett, Peter Wintzer, Saeed Akbar Sheikh, Patrizio Gallone "Chlorine Oxides and Chlorine Oxygen Acids" in Ullmann's Encyclopedia of Industrial Chemistry 2002, Wiley-VCH. AP crystallises as colorless rhombohedra. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binder (material)
A binder or binding agent is any material or substance that holds or draws other materials together to form a cohesive whole mechanically, chemically, by adhesion or cohesion. More narrowly, binders are liquid or dough-like substances that harden by a chemical or physical process and bind fibres, filler powder and other particles added into it. Examples include glue, adhesive and thickening. Examples of mechanical binders are bond stones in masonry and tie beams in timber framing. Classification Binders are loosely classified as organic ( bitums, animal and plant glues, polymers) and inorganic ( lime, cement, gypsum, liquid glass, etc.). These can be either metallic or ceramic as well as polymeric depending on the nature of the main material. For example, in the compound WC-Co (Tungsten Carbide used in cutting tools) Co constitutes the binding agent for the WC particles. Based on their chemical resistance, binders are classified by the field of use: non-hydrau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christmas Baubles And Sparkler (02)
Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people around the world. A liturgical feast central to Christianity, Christmas preparation begins on the First Sunday of Advent and it is followed by Christmastide, which historically in the West lasts twelve days and culminates on Twelfth Night. Christmas Day is a public holiday in many countries, is observed religiously by a majority of Christians, as well as celebrated culturally by many non-Christians, and forms an integral part of the annual holiday season. The traditional Christmas narrative recounted in the New Testament, known as the Nativity of Jesus, says that Jesus was born in Bethlehem, in accordance with messianic prophecies. When Joseph and Mary arrived in the city, the inn had no room, and so they were offered a stable where the Christ Child was soon born, with angels proclaiming this news to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
