Have I learned how to build a great senko hanabi? What are they? Why are they the best firework ever? Let’s find out! These breath-taking sparklers are rarely seen outside of Japan.

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WARNING! All chemical experimentation involves some risk and fireworks carry a serious risk of injury or death and should only be done under the supervision of a trained expert. Be smart.

0:00 Intro
0:58 What is Senko Hanabi
2:13 How I Got Here
5:39 The Ingredients
9:29 Building the Senko
12:28 The Chemical Reactions
13:27 The Four Stages
14:37 Thank You

NightHawkinLight has several excellent videos on senko hanabi:
His original efforts: https://youtu.be/9tl8DAwJ7S0
His apprenticeship with Tsutsui Tokimasa Fireworks Company: https://youtu.be/yvoUYEu3o-c
His further exploration of sparking: https://youtu.be/WmjsL0BJILA

Dr. Van Der Sypt’s excellent papers (download links are there… scroll down!):

Polysulfide sparklers revisited: a practical introduction to Carbo Hanabi

The Senko Hanabi Sparkler: A Study Of Its Reaction Mechanisms

The Senko Hanabi Sparkler: A Study Of Factors Affecting Construction And Performance

Here is a link to the Tsutsui Tokimasa Fireworks Company. This is an amazing company. Ryota and his wife are mindful stewards of this ancient art in the modern world. https://tsutsuitokimasa.jp/item

Here is a link to the outstanding Japanese documentary about Tsutsui Tokimasa Fireworks Company. https://www3.nhk.or.jp/nhkworld/en/ondemand/video/3019088/

“The Senko Hanabi Sparkler: The World of Glitter in a Drop of Fire, Part I & Part II’ Frederick Van Der Sypt, M.D. July & October/November 2013, Pyrotechnics Guild International, Bulletin No 185 & 186

‘Fragile Coloration Mechanism of Traditional Japanese Sparkler, Senko-Hanabi’, Chihiro Inoue, Taiki Watanabe and Yuzo Inokuchi. Department of Aeronautics, Kyushu University Fukuoka, Japan. 17th International Symposium on Fireworks, May 6-10, 2019

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