Went to a party on Saturday night - lots of purchased fireworks from "Millenium Fireworks" - anyone heard of these? Anyway, we hade x1 HUGE crackiling fountain cone - approx. It was big - fantastic golden sparks layered with loud crackling stars.
Lasted for around 1 minute Very cool. I'd love to me able to make these. Posted 10 January - PM How are crackling stars made or what chems are used to make them? No Eating or drinking until you change clothes and shower. I learned the hard way and have a slight lead level in my blood as the result Caveat Emptor Bismuth trioxide works nearly just as well and is not "As" toxic. Quick and easy microstars by me Choose formula.
Place ingredients in ziplock bag, Shake rattle and roll until ingredients are well blended Purists will be screaming Static, Plastic, Static Work on a day that humidity is about 55 to 60 and use static gard spray OK , now then With gloved hands, remove putty from bag form a ball and gently scrape ball of compound across a window screen mesh size sieve, again, not rocket science here, use what you have, allow putty to drop onto kraft paper through sieve, forming small stars, do not layer, but move sieve around to form a single layer of the small "Stars".
If putty comes through sieve in the form of "strings" putty is too wet, just knead some more and it will become the right consistency, go back to screening process. Acetone will evaporate in a day easily, sooner if it's warm out side. There are old pyros, and there are bold pyros, but there are not very many old, bold pyros It was cheap and in my opinion the contained some of the best garden rockets I've seen.
Posted 11 January - PM Why crackling stars? This is the most common effect on the market here eny way. Leadoxide or bismuthoxide are surely the safest. I would never put this in a shell or enything if I would drop it or something! Edited by Yugen-biki, 12 January - AM. I very much doubt this, but the 'red phospourous, sulphur, chlorate' composition posted above got me thinking Posted 11 January - PM Shimizu have a formula for crackling balls using realgar, sand and chlorate.
The sand is for igniting the comp when throwing the comp, formed to balls, on the ground. This is as dangerous as making the one with red phosphorus I guess! I dont really remember but if lead and bismuth is hard to get it might be worth testing. But crackling stars are dangerous due to friction and shock problems A safer way may be to make a number off small salutes with safer flash comps Multi salute shell Posted 11 January - PM A competely different effect from crackling micro stars or dragon eggs.
Your barkin' up the wrong tree fellas. Posted 11 January - PM Lead is easy to obtain. I get mine from a builders merchant. Are there any crackaling forumlas that use lead as it is or ones that use easy to make lead compounds? Posted 11 January - PM It needs to be the lead or bismuth compounds that Burlhorse has listed. Some compounds, especially red lead, tend to cohere to the wires of the screen and are very messy to handle as well as hard to remove completely.
It may be a good idea to reserve a special mixing screen for mixing egg comps only. Once the mixture has passed the screen for several times the composition is basically complete and well-integrated.
It can be packed, labelled and stored for future use or dampened to make it into granules immediately. In the latter case the composition is repeatedly dampened with small portions of nitrocellulose lacquer. Each time the solvent is kneaded into the dough. This step is repeated until the whole mass shows a flexible, rubber-like consistency. In case the mass has been over-wetted and thus shows a grease-like consistency more dry composition can be added for compensation.
If the mass becomes too dry during the following granulation step, add a portion of cellulose thinner to re-wet it. Once dampened with NC lacquer, push the mass through a 10 mesh screen quickly to obtain small granules resembling grains of rice.
Try to keep the batches to about a gram maximum or else the lacquer will probably dry before you get the stars screened. If the granules are intended to be primed, roll them in dry prime while they are still damp. If they are already dry, spray them with acetone to make them take up the prime. Once dampened with NC lacquer, the mass is transferred onto a working surface e.
A few irregular cuts are made with a spackling tool or similar to give handier pieces for the next step. The rolled out mass is let dry as is. The dried pieces are then transferred into a stable container e. A mask should be worn as the crushing operation produces some dust. However, if we use the right tools the process is quite safe. The resulting irregular grains are separated by size using screens. The grains produced by this method are very durable as well as easily ignited due to their sharp edges.
However, the technique itself seems to be rather unknown among amateurs, although it or a very similar one is the one commonly applied commercially. When crackling microstars are embedded into a surrounding star composition, preferably of a tailed type, these stars are called matrix stars. Some comps were designed specifically for this purpose while many others are expected to work and harmonize equally well. Here is a charcoal streamer-type composition from Hardt p. This blend is then dampened with water and made into common pumped stars the fast burning rate of the charcoal type comp must be taken into account.
The stars display a charcoal tail with additional silver streams as well as an intense crackling effect. They harmonize well with most other effects and add a popular acoustic dimension to the display. Pyrosource Wiki Explore. Wiki Content. Recent blog posts Forum. Explore Wikis Community Central. Register Don't have an account?
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