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Silver StarsEdit

From PyroGuideEdit

Lancaster Silver, 8mm pumped starsSilver stars are beautiful pyrotechnic effects in which various forms of aluminum are employed to obtain diverse appearances of silver flame, fire dust etc. Due to the high metal content the compositions may be somewhat harder to consolidate and a hot (non-BP) prime may be necessary to properly light the stars.


Shimizu Silver Waves A B C D
Potassium perchlorate 50 45 40 35
Aluminium (flake) 50 55 60 65
SGRS 5 5 5 5
Flitter is probably the best choice, but "Bright" or "Bronze" grades may also be employed. Various burn durations and flame sizes are obtained when varying the ratios oxidizer-fuel from A to D. For round stars the starch content may be raised to 8-10% for easy consolidation. The stars need hot two-stage primes employing e.g. thermite or silicon.


Shimizu Brilliant core - 3mm cut
Barium nitrate 66
Aluminium (fine flake) 27
Boric acid 1
SGRS 6
The cut stars are used as cores for star rolling and give an intense light when the star burns out. The cores burn very fast and move around violently when unevenly ignited (they "swim"), producing an unsightly final stage of the flower. To avoid this the cores are coated with a "core coating comp" before rolling proceeds. Boric acid in solid form can be avoided when we dissolve 2% of it in the solvent.
Add 25% alcohol / 75% water (with 2% boric acid)
Shimizu Core coating composition
Potassium perchlorate 33
Barium nitrate 34
Aluminium (fine flake) 10
Colophonium (Vinsol resin) 8
Antimony trisulfide or Sulphur 9
Boric acid 1
SGRS 5
This is used to coat the "brilliant cores" until they become rounded. Red gum may serve as a substitute for Vinsol. Boric acid again is best dissolved.
Add 25% alcohol / 75% water (with 2% boric acid)
Shimizu Silver star
Potassium perchlorate 56
Colophonium (Vinsol resin) 15
Aluminium (fine flake) 32
Lampblack 2
SGRS 5
Add 25% alcohol / 75% water
Lancaster Silver
Potassium chlorate 56
Aluminium (bright) 19
Aluminium (dark) 19
Dextrin 6
Sensitive! Mix and handle with care! Very fast burning! Use large stars.
Add 25% alcohol / 75% water
Ofca Silver Flitter
Potassium perchlorate 59
Barium nitrate 4
Aluminium (bright) 21
Red gum 6
Charcoal (airfloat) 4
Dextrin 6
Add 25% alcohol / 75% water
Bleser Silver Flitter #14
Potassium perchlorate 33
Aluminium (dark) 61
Dextrin 6
Add 25% alcohol / 75% water (cont. 2% boric acid)
Hardt Silver Star #1
Potassium chlorate 59
Aluminium (bright) 26
Red gum 7.5
Dextrin 7.5
Add 25% alcohol / 75% water
Hardt Silver Star #2
Potassium chlorate 50
Potassium nitrate 8
Aluminium (bright) 21
Aluminium (flitter) 8
Red gum 5
Dextrin 8
Add 25% alcohol / 75% water
Hardt Silver Star #3
Potassium perchlorate 32
4FA Black Powder 28
Aluminium (dark) 6
Aluminium (bright) 21
Aluminium (flitter) 5
Dextrin 8
Add 25% alcohol / 75% water
Hardt Silver Star #4
Potassium perchlorate 30
Potassium nitrate 27
Aluminium (dark) 15
Aluminium (atomized -120 mesh) 15
Red gum 8
Dextrin 5
Add 25% alcohol / 75% water
Hardt Silver Star #5
Potassium perchlorate 58.5
Aluminium (dark) 15
Aluminium (bright) 15
Red gum 7
Dextrin 4.5
Add 25% alcohol / 75% water
Popi's aluminum silver star
Potassium Nitrate 50
Aluminium (325 mesh) 40
Aluminium (flitter) 20
Dextrin 8
Add 50% alcohol / 50% water (with 2% boric acid)
mix 1/10 of the mixture in a a separate cup, slowly add the rest of the mixture trying to use minimum amount of water

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