Warimono Chrysanthemum

Warimono is a shell which displays a flower like a chrysanthemum in the sky. The stars stretch out to form a round flower. The duration of the flower is generally 2 4 seconds. 

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In this table "Large" is used for Poka and "Small" for Warimono (Chrysanthemum). Warimono is manufactured by pasting many layers of paper on the sphere and the completed shell has a thicker wall than that of Poka. It is necessary to manufacture both Poka and V/arimono with the same external diameter since they are both used in the same size of mortar. 

Pasting is peculiar to Japanese firework manufacture. Stars are allowed to grow into a spherical shape by sprinkling the powder of a composition on to core grains. This process is popularly applied for the manufacture of colour changing stars used for the Warimono shells Chrysanthemum. In Japan maximum effort is made in the production of stars of this kind. 

Compositions for chrysanthemum shells(Warimono) must be selected with special care, but for Poka the selection is not as serious as for Warimono. 

The description here particularly refers to the bursting charge of the chrysanthemum shell which are called "Warimono" in Japan. A different bursting charge is used for the other kind of shell called "Poka" which simply uses black powder grains. 

When we change the weight ratio of the three components, potassium nitrate, sulphur and charcoal, in steps, we have reddish fire dust sparks with correspondingly varied lives. Chrysanthemum 6 and 8 are of relatively short life and fit stars for the chrysanthemum(Warimono). To obtain a pretty remaining fire, it is not enough merely to mix the three components, but the potassium nitrate must be allowed to soak into the... 

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