PIL Posted July 16, 2015 Posted July 16, 2015 It is impossible to buy dark aluminum in my country. However lab grade magnesium is quite easy to obtain. What I'm thinking about is to use KNO3 and 200 mesh dichromate coated magnesium as the shell booster. My test shows that it isn't very sensitive to impact，friction or electric sparks. Once ignited it burns extremely fast and makes a poof noise .My question is :Is it a safe substitution for perchlorate aluminum flash? Then how much can be used in a 3" shell Thanks.
OblivionFall Posted July 16, 2015 Posted July 16, 2015 You might find that it is too fast for booster. Also Magnesium with KNO3 and also KClO4 is more sensitive I have heard not just friction or impact wise. You also have to take into consideration that it is hydroscopic. What I have heard is that Perchlorate/Aluminum and Nitrate/Aluminum/Sulfur are the only two types of flash that you can safely keep in a shell for more than a week or your KNO3:Mg could ignite by itself. Obviously a one in one million chance, but things happen and you don't want a 3"+ shell going off in storage with other fireworks.
fckiamdead Posted July 16, 2015 Posted July 16, 2015 You might find that it is too fast for booster. Also Magnesium with KNO3 and also KClO4 is more sensitive I have heard not just friction or impact wise. You also have to take into consideration that it is hydroscopic. What I have heard is that Perchlorate/Aluminum and Nitrate/Aluminum/Sulfur are the only two types of flash that you can safely keep in a shell for more than a week or your KNO3:Mg could ignite by itself. Obviously a one in one million chance, but things happen and you don't want a 3"+ shell going off in storage with other fireworks.PIL:Mg/KNo3 may be to fast/powerfull as a booster. hydroscopic? I dont think so, correct me if i am... BUT it's sensitive to moistere/water because of the Mg. You can store Mg/kno3 if it's dry in your final product and if the Mg is treated whit Potassium Dikromat.
schroedinger Posted July 16, 2015 Posted July 16, 2015 Yes it will work, but how much of that mix is an other question. It really depends on your other components too. A good starting point will be 0.5 g and work your way up in .5 g steps until your stars blow blind or you are satisfied. An other way would be to switch over to KP or H3.
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