A firework is classified as a low explosive pyrotechnic device used primarily for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display. A fireworks event (also called a fireworks show or pyrotechnics) is a display of the effects produced by firework devices on various occasions. Fireworks competitions are also regularly held at a number of places. The biggest fireworks event in the world is held in Madeira, Portugal at the New Years' Eve celebrations, as referred in the Guinness World Records.
Fireworks (devices) take many forms to produce the four primary effects: noise, light, smoke, and floating materials (confetti for example). They may be designed to burn with colored flames and sparks. Displays are common throughout the world and are the focal point of many different cultural and religious celebrations.
Fireworks were originally invented by the Chinese, for entertainment purposes, as a natural extension of the Chinese invention of gunpowder. In China, they were first made by firework masters who were well respected for their knowledge of the many complex techniques used to create truly dazzling firework displays. Such important events and festivities as New Year's and the Mid-Autumn Moon Festival were and still are times when fireworks are guaranteed sights. China is the largest manufacturer and exporter of fireworks in the world.
Fireworks are generally classified as to where they perform, either as a ground or aerial firework. In the latter case they may provide their own propulsion (skyrocket) or be shot into the air by a mortar (aerial shell).
The most common feature of fireworks is a paper or pasteboard tube or casing filled with the combustible material, often pyrotechnic stars. A number of these tubes or cases are often combined so as to make, when kindled, a great variety of sparkling shapes, often variously colored. The skyrocket is a common form of firework, although the first skyrockets were used in war. The aerial shell, however, is the backbone of today's commercial aerial display, and a smaller version for consumer use is known as the festival ball in the United States. Such rocket technology has also been used for the delivery of mail by rocket and is used as propulsion for most model rockets.
Improper use of fireworks may be dangerous, both to the person operating them (risks of burns and wounds) and to bystanders; in addition, they may start a fire if landing on flammable material. For this reason, the use of fireworks is generally legally restricted. In the United States, fireworks are classified as either consumer or display fireworks based upon the amount of pyrotechnic composition an item contains. Display fireworks are restricted by law for use by professionals. Consumer items are available to the public and are smaller versions containing limited amounts of material to reduce potential dangers.
Fonte Wikipédia
A CACHE:
POR FAVOR NÃO FUME OU FAÇA FOGO NA ÁREA DA CACHE!
A cache está localizada perto de uma fábrica de pirotecnia.
Um aviso a cerca desta cache. É uma cache como qualquer outra, todavia faz também parte de um projecto multi-cache de cooperação internacional entre vários Países. Em cada um desses Países, a cache Primária (como esta) está escondida num local. Quando um Geocacher encontra a cache, também encontra uma lista de hints, com “dicas” para as caches secundárias por todo o mundo. Essas caches secundárias só podem ser encontradas através das hints espalhadas por todo o globo. Assim, se quer encontar a cache secundária do seu País (em Portugal a IMC No.4 S-PT – Caldeira da Lagoa das Furnas), deve de trocar as hints que encontra nesta cache primária, com hints que outros Geocacheres encontraram nas suas caches primárias.
Este projecto IMC (o quarto) é dedicado ao elemento "Fogo". Espero que se divirta com a experiência de caçar esta cache e que não fique por aqui e tente encontar a cache secundária…
Vai encontar os links para todas as outras IMC No.4 no seguinte link: All IMC No.4
Uma nota de "agradecimento" ao MAntunes, que iniciou o projecto IMC Caches em Portugal (fez parte do projecto inicial IMC No1 g group) e impulsionou o IMC No.4 recrutando membros para este projecto por todo o mundo.
THE CACHE:
PLEASE DONT SMOKE OR MAKE FIRE IN THE CACHE AREA!
The cache is located near a Fireworks Factory.
Still, a warning has to be made on this cache. It is a cache as any other, but is also the start for an international cooperation multi-cache between many countries. In each of these countries, a primary cache (like this one) is hidden somewhere. When a Geocacher finds it, he / she will also find a hint sheet, with hints to all the secondary caches around the world. These secondary caches can only be found with the hints that are scattered all around the globe. That means that if you want to find the secondary cache in your country (in Portugal it is IMC No. 4 S-PT – Caldeira da Lagoa das Furnas) - , you have to trade the hints you discovered in this primary cache, with the hints other Geocachers found on their countries primary cache.
This IMC set (the 4th one) is dedicated to the "Fire" element. But I hope you don’t have your experience enhanced by feeling a shake while hunting for this one…
You will find links to all other IMC No4 caches in the below link: All IMC No.4
Just a quick "thank you" note to the MAntunes, who started the IMC caches in Portugal (he was part of the initial IMC No 1 g group) and who helped to move the IMC No 4 forward by recruiting members all over the World.