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Topic: Can flash made from KMno4 and Al cause blindness?  (Read 9286 times)

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Offline Basha

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Can flash made from KMno4 and Al cause blindness?
« on: November 11, 2009, 09:10:35 AM »
Can flash made from KMno4 and Al in ratio 3:2 (saw from distance about 0,7 m, less than 5g) cause blindness? (we set it on fire by Mg, because this is not a really good ratio) If it is stupid Question, or in bad category sorry. Thanks for all answers. (and i know pyrotechniks are dangerous)

Offline Borek

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #1 on: November 11, 2009, 09:46:05 AM »
Question is not stupid, but impossible to answer. Depends on zillions of unpredictable factors.

0.7m sounds dangerously close, but I had similar mixture exploding in plastic tube I held in my hand - and I am not blind nor fingerless, so obviously if you are lucky you can survive intact. But that was a stupid mistake on my side and a lesson that I remember very well, I would not try the same for the second time.

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Offline Basha

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #2 on: November 11, 2009, 10:01:12 AM »
Thank you for answer. I am happy i am not blind  :D

Offline BetaAmyloid

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #3 on: November 11, 2009, 10:50:42 PM »
If you ever did, you would want to wear a mask with dark contrast.

:rarrow: Flash Blindness :larrow:
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline Basha

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #4 on: November 12, 2009, 10:13:47 AM »
I know I should wear mask with dark contrast. I forgot only.

Offline BetaAmyloid

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #5 on: November 12, 2009, 04:37:05 PM »
I forgot only.

Its usually good to not forget lab safety.  :P haha
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline 408

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #6 on: November 12, 2009, 06:24:36 PM »
Mg based flashes do emit UV, so it is not likely good for your eyes.
I was temporarily blinded( 30s or so) by a strontium nitrate and Mg flash made many years ago.

Offline BetaAmyloid

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #7 on: November 12, 2009, 10:52:45 PM »
How long was your temporary blindness?
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline Borek

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #8 on: November 13, 2009, 02:47:36 AM »
I was temporarily blinded( 30s or so)

How long was your temporary blindness?

Reading comprehension...
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Offline BetaAmyloid

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #9 on: November 13, 2009, 06:28:59 AM »
Reading comprehension...

Oh is that what they call it?

I thought he meant his age. I thought he meant he was in his "30's or so."

Thanks for the help Borek - great guy.

:)
Discovery consists of seeing what everybody has seen and thinking what nobody has thought - Albert Szent-Györgyi

Offline 408

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Re: Can flash made from KMno4 and Al cause blindness?
« Reply #10 on: November 13, 2009, 10:27:08 AM »
I was temporarily blinded( 30s or so)

How long was your temporary blindness?

Reading comprehension...

Thank-you, Borek for clearing that up before I was online again.

The blindness was likely not the result of the mass of flash, which was only a few grams, non stoichiometric as I wanted longer red light emission, not an explosion, but the fact that it burned faster than anticipated for a nonstoichiometric mix, and this occured less than a meter from me.  Lesson learned: use an ignition method that gives you some distance from what you are testing.

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