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Initial Mixture Setup
- ~1 1/3 parts KNO₃ to 1 cup water
- Heated at 1 notch above medium
Note on Boiling
- Mixture took approximately 19 minutes to reach frothing stage during testing prep
Burn Test Results
3-Minute Boil
- Burned very slowly, but did not extinguish
- Flame appeared weak and not very hot
- Complete burn of the string took about 2 minutes
- Recorded burn time: 2:13
4-Minute Boil
- Slight increase in burn speed over 3-minute test
- Still a relatively low-temperature flame
- Recorded burn time: 1:50
5-Minute Boil
- Notably faster burn compared to previous tests
- Flame remained relatively cool
- Recorded burn time: 2:02
14-Minute Boil
- Best result so far — good burn speed
- Burn was unstable: started fast, slowed, then picked up again
- More testing needed for consistency
Near-Saturated Boil (Frothy Mix + Minimal Water)
- Extremely reactive and unstable string
- Burned at a very fast and hot rate
- Bits of string flung everywhere during combustion
Excess KNO₃ Boil (Fully Saturated)
- Would not ignite, even after repeated attempts
- Confirmed: over-saturation prevents burn
Observation on Fuse Made from Near-Saturated Mix
- Burned with unstable speed — started fast, slowed, but remained rapid
- Behavior mirrored 14-minute fuse characteristics
Additional Notes
- Variation in burn times likely due to lack of batch consistency testing
- Environmental effects like wind may have influenced results
- Observed that some outer string wraps burned faster than the main slow-burning core
- One fuse emitted enough heat to ignite a small piece of caramelized sugar and KNO₃ mixture