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lamp black


memo

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when adding lamp black to lets say to tiger tail would you subtract the amount of charcoal you add in lamp black or is it just a add to the formula. _

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I just added the lampblack. You don't need much. Depending on the effect your after it makes a fuller effect. I also added as all amount of course charcoal. I intend to use for spider stars. They still burn very quickly.
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thanks merlin, going to add some feti and some ti with the lamp black

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That ought to make a nice tail. It has quite a orange reddish tail. The star will burn out before the hang time. I have read that for spiders you need overly large stars. Eg. 1/2 to 3/4" for a 4" she'll. Made mine 3/4.

The sky is the limit for experimentation!

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A little bit of lampblack can really make a difference. It only takes a couple parts to be noticeable. As long as you keep the amount low I wouldn't bother much with adjusting formulas. If you were going to add more on the order of 10 parts, you might want start to substituting it. I use the following formula for reference. I like that it doesn't require milling. It's a Mike Swisher formula I got from rec.pyro. I have a link, but it looks like it's been taken down for the time being. It's in pounds/parts, but I've included the percentages for reference.

 

Mike Swisher Lampblack Spider #1
KNO3 - 18 lbs (55.4%)
C - 9 (27.7%)
S - 3 (9.2%)
Dex - 2 (6.2%)
Lampblack - 0.5 (1.5%)
This formula being unmilled, burns a little slower than the Degn formula that is also common. I tend to make them on the smaller side for spider shells, but they still burn plenty fast.
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