What is a good sized ball shell to build for the first time

[dgsh009]

Hello my friends
I make some C6 stars , but after drying , They break easily by hand and not solid and strong.
I use water/alchol for solvent and 5% dextrin.
What is the reason?
 

[Zumber]

First is stars may not have fully dried out, secondly it may have "driven -In" ( stars have dried out outer side completely but not in the center)

Have you made a burn test on ground? This clearly gives out an idea if it is dried or not.

[dgsh009]

3 hours ago, Zumber said:

First is stars may not have fully dried out, secondly it may have "driven -In" ( stars have dried out outer side completely but not in the center)

Have you made a burn test on ground? This clearly gives out an idea if it is dried or not.

yes ,in ground test it burns fast. (similar to BP)

I think maybe dextrin didnt active because of high percent of alchol.
How can made it slower and more spark spreading?

[Zumber]

9 hours ago, dgsh009 said:

yes ,in ground test it burns fast. (similar to BP)

I think maybe dextrin didnt active because of high percent of alchol.
How can made it slower and more spark spreading?

Chrysanthemum 6 is fast burning star if you want slow burning mixture you may switch to C8 or even you may try to increase charcoal. Try to use hardwood charcoal for stars like pine, softwood charcoal isn't suitable for this effect.

How much percent alcohol you have used?

[dgsh009]

1 hour ago, Zumber said:

Chrysanthemum 6 is fast burning star if you want slow burning mixture you may switch to C8 or even you may try to increase charcoal. Try to use hardwood charcoal for stars like pine, softwood charcoal isn't suitable for this effect.

How much percent alcohol you have used?

I made this formula comp :
i use russian SPF wood charcoal for the comp(Charcoal – 23)
but my bp(meal d) was commercial charcoal.(lemon wood)
I use 50-60% (i guess) ethanol in warm water.

Chrysanthemum 6

• Meal D – 77
• Charcoal – 23
• Dextrin – 5

[Zumber]

Chrysanthemum 6

Potassium Nitrate -55

Pine charcoal-33

Sulphur-07

SGRS-05

You have to use little alcohol, 75/25,70/30,80/20 water/alcohol would be a good starting point.

[dgsh009]

24 minutes ago, Zumber said:

Chrysanthemum 6

Potassium Nitrate -55

Pine charcoal-33

Sulphur-07

SGRS-05

You have to use little alcohol, 75/25,70/30,80/20 water/alcohol would be a good starting point.

thank you.
 

[Zumber]

2 hours ago, dgsh009 said:

thank you.
 

Welcome..!