"Is there a difference depending on the company that makes fireworks?" I asked the active fireworks mystery about fireworks secret and fireworks display points

A firework sparkling in the night sky. There are many kinds of things that change color, something that splashes thoroughly, and fireworks. These fireworks are made by the technology each of fireworks companies cultivated, and features such as fireworks that are good at fireworks companies and original fireworks appear. This time,""What is a winter fireworks company? I interviewed fireworks makers who are making videos that understand the things I want to know about fireworks, and also watched the fireworks factory"I asked Mr. Katsunori Kato of Fireworks about fireworks difference by fireworks company and how to enjoy fireworks festival.

Kato Hakko Co., Ltd.
http://www.katoenka.jp/

◆ Fireworks related videos released by Kato Hakko Co., Ltd.
The YouTube channels released by Kato Hakko Co., Ltd. are as follows, and more than 40 movies that show the structure and history of fireworks are released.

Kato Hakodate Co., Ltd. - YouTube


Arrived at the fireworks factory of Kato Hakko Co., Ltd.


I will talk to Mr. Katsunori Kato of Fireworks.


GIGAZINE (hereinafter, G):
Thank you. This time we will ask about the difference of fireworks by fireworks company and how to enjoy fireworks display. First of all, please explain the basic parts such as "Why does it spread" and "How to put out color"?

Mikawa fireworks The latest akira Kato Hakko Co., Ltd. Kato Kato (hereafter, Kato):
Basically, we use three kinds of explosives at the skyrocket. A gunpowder to be launched and a gunpowder to explode fireworks called "quotient" and a glow glow that is called "star".

There is a gunpowder to be launched in a part like a cobbag under the fireworks ball.


Kato:
While the fireworks are rising, the fire is heading towards the center through the fuse and the fuse is adjusted so that the fire at the center will fire at the timing when it is over. When fire is split, fire spreads in the ball for a moment, and the star also has a fire. The garbage evaporates to gas, the pressure inside the ball increases, and when the ball skin can not tolerate the internal pressure it explodes at once and scatters the stars.

"Granule" is fine granular powder between the center and the stars.


A large particle explosive is a gunpowder to give out a color called "star". In the case of this fireworks, you can see that a fireworks with a triple circle called an octave core can be seen by alternately superimposing the star and the medicine.


G:
What kind of mechanism is the star of fireworks whose color changes?

Kato:
Gunpowder will burn in turn from the outside, so you can change the color by layering it.


G:
There are times when I see flashing fireworks, but do you overlap explosives that emit colors and explosives that do not come out?

Kato:
No. The blinking fireworks use explosive which repeats the change of the state of lighting and smoldering, it is not made to layered in layers.

G:
There seems to be various contrivances by fireworks companies, such as "what colors do you use" and "how can you shine". What part is the most different part by the fireworks company?

Kato:
The formulation of the explosive is all.

G:
Even with fireworks of similar colors, are companies different in the composition of explosives?

Kato:
Yes, it is wrong. Regarding the blending of gunpowder, each fireworks company independently studies and develops it.

G:
The blend of gunpowder is a company secret. Does that make it a secret that there are colors and lighting methods that can not be easily done?

Kato:
yes, I have. Blue is difficult.

G:
For what reason is it difficult to get blue?

Kato:
There is an appropriate temperature for the explosive to give out the color. If it is red, the tolerance range is wide and colors can be output at various temperatures, but the allowable range of blue for the blue color is narrow.

G:
If it falls outside the allowable range, will it become another color? Or is there no color?

Kato:
The color will not come out. If you can just light in blue, you can just make it by just adjusting to the appropriate temperature. However, the blue color is very dark. In order to make it bright, it is necessary to raise the temperature, but then the blue color will not come out. So, it is necessary to devise various materials and devise them, but it is a secret which one to mix in which proportion, and you have to do research.

G:
In the present era, it seems possible to calculate chemical formulas from computers and give appropriate proportions, but can not you?

Kato:
Although it is possible to predict to some extent what happens when mixing two kinds of materials, it is possible to predict to a certain extent, but since it mixes about 7 to 8 kinds, about 10 kinds at many times, it is too complicated to give answers in calculation and chemical formula I heard that I can not do it.

G:
You can only get it by experience.

Kato:
Yes, I really do not know until I see what to shine by actually launching.

G:
It is said that even Kato Fumadesu has been studied and has its own formulation.

Kato:
Yes, I have been improving various colors from long ago, but the reaction of customers most changed when the silver color changed.

G:
It was developed a completely different silver color as the impression changed.

Kato:
Even when we looked at it, there was a difference in silver color, saying that "Another company raised it".

You can see what the original fireworks using Silver (which is explained as white in animation) are videos that Kato Hakko Co., Ltd. has published on YouTube.

【Seasons Snow】 Kato Okayama Co., Ltd. Official Promotion Video - YouTube


【Yukiwarisou Yukiwarisou】 Kato Odaiba Co., Ltd. Original fireworks - YouTube


【Silk Flower】 Kato Odaiba Corporation Original fireworks - YouTube


G:
Do you have any other fireworks that colors or shines like Kato Fumarou Anyway?

Kato:
I am confident of the flashing fireworks.

G:
What are the characteristics?

Kato:
I think that it is bright and sharp. Regarding blinking, I think that we can make pretty good ones.

The photo was taken charge by Kato Hakko Co., Ltd.Anjo Industrial and Cultural Park DenpakFrom the event fireworks.


G:
Even the method of blinking is different for each company. I would like to take a closer look at this time. There are other fireworks that express marks and characters such as smiles and doro-cats when speaking of fireworks unique to the company, but are there any original ones at Kato Fireworks?

Kato:
There are oranges.

【Mikan Mikan】 Kato Fireworks Co., Ltd. Original fireworks - YouTube


I will talk to Mr. Masahito Ozaki who made "Mikan".


G:
What kind of idea did the oranges be made?

Kato Okazaki Co., Ltd. Ozaki Masahito (Ozaki):
Flat things such as smileies and hearts will change shape depending on the viewing direction. Looking at the picture from the front, I can draw a picture, but when I see it from the side, I can not see the shape as it is aligned vertically. So, it is this solid oranges made by saying "I will make three-dimensional ones so that they can be viewed as works as seen from anywhere".

G:
At Kato Fireworks, you make not only planes but also stereoscopic ones.

Ozaki:
I am trying to say "what you see beautiful wherever you are".

G:
Do you write design drawings etc?

Ozaki:
First of all, write it in the drawing, pack the ball as it is, raise it up with a trial and go out as the image, but if it is useless, rewrite the design drawing ...., I make it by trial and error.

G:
Or are you making other new things?

Ozaki:
Yes, I thought that what I tried raised the other day is good. I can not say yet when to concretely say, because I can not establish enough mass production yet, but I am making a new work.

G:
Is there any difficult place in making fireworks that can see the picture?

Ozaki:
The stars of fireworks can not express detailed parts because the grain is large and the number is limited. It is a difficult place to deform so that the original picture can be imagined though it grabbed the feature well and it is not the original picture.

G:
May I ask a question of simple questions? Fireworks spreading on one side and fireworks that can see the painting are also launched Fireworks balls are thought as raising the same round balls, but I think there are considerable gaps in parts other than paintings. What is being stuffed in there?

Ozaki:
It is quotient. Since it enters a lot, I keep a balance by putting something that weakened a little power.

Kato:
The fireworks of these shapes sound louder because there are many quotas.

G:
I see. I also want to take a closer look at this point when looking next. I have another question. There are also large balls with a diameter of 30 cm called fireballs because there are sizes in fireworks balls, but can not you raise a picture with a scale ball? I think that it is interesting even if a huge smile comes out.

Ozaki:
In the case of a picture, there are invisible visible depending on the orientation, so cost performance is bad. If you do, I think that it will be to pack small balls and raise many pictures at once. In fact, I have something like that.

Kato:
Mandarin oranges are also raised in scale.

G:
The orangama oranges are impressive. Come and I'd love to see. Besides, if there are any interesting episodes, please.

Ozaki:
A lot of requests are requested that I want you to do such a picture, but there are things like "I will be able to make it, but if I do launch this, I will not get the job from next", and recently "(^ o ^ ) "Will come as well. You can do this if you want to do, but what is limited to the age and subjects is that it is difficult to raise at the fireworks festival.

G:
It is not that it can not be done, but what kind of people everyone knows is prioritized.

Ozaki:
It disappears in a moment and shapes are not constant but they collapse. Still, even if I raise it if it is not understood at once, I do not care for customers, so I am raising many easy-to-understand items such as hearts and smiles.

G:
Thank you very much. Let's ask Mr. Kato to continue with the question about fireworks. Is there anything else devised to make a star that glows fireworks?

Kato:
It is the size of the star that you must consider when making stars. The amount of material will change when trying to make each color shine at the same brightness, so if you simply make stars with just the necessary materials, you will become stars of various sizes. Then, if you make fireworks that can shine multiple colors at the same time, it is difficult to pack stars and it does not spread to a clean shape. So it is necessary to decide and adjust "the size of this fireworks star is this".

G:
The fireworks that put out multiple colors at the same time were misunderstood that it would be easier simply by stuffing stars appropriately.

Kato:
In addition, the burning time is different depending on the color. If you look closely at the fireworks of coloring (things mixed with various colors), red and yellow will disappear quickly and green will remain until the end. However, we will have plenty of companies to align this. Since it becomes important to make fireworks with high appraisal at the same time as it glows and disappear at the same time, we must also devise measures to equalize burning time.

G:
The view of coloring fireworks has changed. From now on, colorful fireworks will also focus on how to disappear. Although it is a question to follow, although it is sometimes to see a fireworks with multiple core, such as triple core, quadruple leader etc., yet it is a 1.5 - scale ball and a large core like a ten - I wonder if I should try making something, but can not I?

Kato:
I think that you can line up the stars, but I think they will probably crush. The stars are made by mixing metal powder, so the balls with the stars are heavier. When launching heavier, the balls of stars and fireworks themselves collapse due to their own weight, not only collapse in shape, there is a danger of exploding when launched.

G:
It is not an easy story that "you can pack a lot if you enlarge the vessel". Besides, is there a difference in fireworks depending on fireworks display and company?

Kato:
This is a difference depending on the provinces, but in order to launch fireworks there is a set of security distances that must be secured between the launch site and the audience seats to ensure safety. This security distance depends on the size of firework sphere to use, but the rules are different in prefecture units, for example in Aichi prefecture, the same security distance (7 cm diameter) (diameter about 21 cm) and No. 8 (diameter about 24 cm) Although it can be launched with other prefectures, the 7th ball is ○ m, the 8th ball is ○ m and the distance may be different. As long as customers are happy to launch big fireworks at the same security distance, we do not make seventh balls at all, we have many opportunities to make 8 balls.

G:
Depending on the region, the size of fireworks also has its own characteristics. Is there anything interesting to see here at fireworks festival?

Kato:
There are fireworks festivals that fireworks companies all over the country gather at one fireworks display and compete with their hands for "fireworks for competition". It is held in Daisen city, Akita prefectureNational Fireworks GamesAlthough it is famous, our company is located in Ise city, Mie prefecture "Ise Shrine dedicated nationwide fireworks festival"We participate every year. At the competition fireworks festival, you can see multiple fireworks and new fireworks using high technology that you can not usually see.

It took place in 2016Ise Shrine dedicated nationwide fireworks festivalFrom the convention program.


G:
To be held in Daisen city, Akita prefecture on March 18, 2017New Fireworks CollectionIt will also participate in the.

Kato:
Yes, at this competition, it is decided by the rules that it is decided by the rules to produce a theme using the 4 fireballs, 5 fireballs fireworks, and to use the new fireworks, compete for it.

G:
What kind of fireworks are planned to be launched this time?

Kato:
This time, an idea comes up from the fireworks that I am trying on everyday and I made improvements such as color for the competition, I want to express the beauty of the fireworks.

G:
The number of days to the convention is close, and are the fireworks to be launched in the convention already completed and kept?

Kato:
Since I am making it now, can you see it?

G:
Come, please.

A workshop filled with pyrotechnic balls with explosives is located in a well-surrounded and isolated place to minimize the damage in case of an accident.


It is about making fireworks balls to be launched to the new fireworks collection, but how it is stuffed with explosives is a secret, so I got you taken only the work process of preparing explosives. Actually, I'm planning to report on the convention of how this fireworks will rise.


It is said that we can also see other work processes, so go to the work place with balls. It is a process to paste kraft paper many times to increase the strength of fireworks balls.


Work rolling the fireworks ball rolling, adjusting the pasted kraft paper and adjusting the fireworks ball cleanly.


It was fine weather, so many stars are being sun dried.


I am collecting stars. Although it is pouring in at a stretch, the star is said that it does not fire on this degree.


Because stars can not distinguish only by seeing, manage a name tag in the box. This is written as a star shining blue in the shakuhachi.


G:
What kind of fireworks can be seen in the new fireworks collection? I'm looking forward to it, is there a fireworks display like Kato Hakko Co., Ltd. that is directing the whole fireworks display?

Kato:
It is held in Gamagori-shi, Aichi Prefecture on Sunday at the end of July every year "Gamagori Festival"We are in charge of the production of the skyrocket fireworks. In addition, fireworks festival where our company is in charge of the whole production,Kira fireworks festival(Aichi prefecture Nishio city) · Seki citizen fireworks display (Seki city, Gifu prefecture). As a fireworks display that is directed jointly and participates in the Games,Toyohashi Gion Festival(Toyohashi City, Aichi) ·Okazaki Castle Ieyasu Kozumi Festival(Aichi Prefecture Okazaki city) · Nagara River National firework display (Gifu city, Gifu prefecture) ·Tokai City Fireworks Festival(Tokai City, Aichi Prefecture) ·Tsuchiura National Fireworks Games(Tsuchiura-shi, Ibaraki prefecture).

G:
Do you have anything you would like to tell the reader, such as how to enjoy the fireworks festival?

Kato:
Fireworks festival has differences depending on fireworks vendors, but recently I began to think what kind of message the fireworks convention itself is transmitting to customers. For example, it will be held in Nagaoka City, Niigata PrefectureNagaoka Festival big fireworks displayThen,Reconstruction prayer fireworks PhoenixThere is a program of fireworks saying. This is also famous as a fireworks program that you can touch. Why are you impressed is because the fireworks that are being launched are tightly meaningful, there is a story nature and we are doing information dissemination so that we can understand even those who are looking at it. If you investigate not only the fireworks that will be lit up but also the meanings and features of the fireworks convention itself, I think you can see more fireworks festival happily.

G:
Thank you very much. I'm looking forward to the new fireworks collection and the Gamagori Festival actually going to see and reporting.

Kato:
Thank you. Please enjoy it by all means.

From fireworks that Kato Powder Co., Ltd. had raised at the winter event. Although it was a short event fireworks of 5 minutes, it was such a powerful scene that it was as if he had brought one program of fireworks display as it is. The audience also enjoyed cheering up.