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Fast, Slow & Delayed fuse


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#1 SKC

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Posted 03 August 2019 - 10:03 PM

In a thread few days back a senior member of ours had said "BP in several grades can produce fast slow & delayed fuse.
I've made my fuse with 6 ply cotton string.
My KNO3 is soft & milky white & I worm it a bit to get rid of moisture within.
My AF C is from Indian species of Ziziphus tree which is shrub kind of plant
.
Sulphur as usual.
In 75/15/10/5(dex) I screen them 5-6 times grind them with mortar & pestle and again screen 2-3 times. Then wet with water.
This way I'm getting fuse equivalent to visco.
Now I intend to prepare fast As well as delayed fuse too.
Seniors please help me on this.

I do have Acetone, doctors spirit & methylated spirit in my stock also. Mentioning if those are handy on this project.
I understand seniors here don't care about 'Thanks in advance', they just do help.

#2 pyrokid

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Posted 05 August 2019 - 02:45 PM

If I interpret this question correctly, you have succeeded in producing a slow fuse by coating a cotton string in BP slurry, and you now want to create a fast fuse with a similar processing method. The solution is to encase your existing fuse in a thin (~2 layer) paper tube. This flexible "quickmatch" burns very quickly.

"fast" visco fuses are typically made by wrapping granulated composition in spiral threads, taking advantage of the air pockets and surface area of the granules to increase the burn speed.

#3 SKC

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Posted 07 August 2019 - 11:49 AM

Thank you Pyrokid & Happy Birthday to you as today is 07/08 here. Yes I know the funda of 'quickmatch'.
My intention was to know the process(if there is any) of making a fuse faster than a fuse made by dipping in 75/15/10/5(dex).
Sometimes back I saw a video of three fuses(not in 'quickmatch' form) burn rate comparison. First one was a delayed fuse. Second one was a normal black match & the third one burnt mutch faster.
Thank you.




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