Cracked borofloat experience

[AzN1337c0d3r]

So I was burning newspaper the other day in front of my friends with a Mag85 I bought from a forum member here on a fresh battery pack. I actually managed to crack the borofloat lenses. I will note that I put the head on the Mag85 on the floor down against the paper and had tightened the bezel ring on rathar tight, introducing more stress to the lenses. But I was under the impression that the borofloat lenses could not be cracked by the temperatures experienced by even the 250W bulbs, let alone a ~35W WA1185.

I was just about to start my own first hotwire mod (Mag623) and now I'm kind of scared. But it's all good, I have 3 extra lenses now. I'll just have to be more careful.

Anyone else manage to crack Borofloat?

 

[Sgt. LED]

My 623's lens did fine. Of course I didn't put it face down on something. I wonder how hot it got in that little oven you created?

 

[tebore]

There's other reasons why it could have cracked if your news paper had color the color ink can evaporate. The ink is a bit oily and like the same way finger oil on bulbs causes them to blow will break your borofloat.

Also Some glass just might have flaws in them. I have a few UCLs where I can see flaws in them and I'm sure if I were to heat it, it would crack.

I lit plenty of fires with my 623 what you shouldn't do either way is let the glass touch the paper. Because while the glass would resist the thermal stress caused by air temp(hundred something degrees) direct contact with the paper means a couple hundred degrees.

 

[AzN1337c0d3r]

There's other reasons why it could have cracked if your news paper had color the color ink can evaporate. The ink is a bit oily and like the same way finger oil on bulbs causes them to blow will break your borofloat.

Also Some glass just might have flaws in them. I have a few UCLs where I can see flaws in them and I'm sure if I were to heat it, it would crack.

I lit plenty of fires with my 623 what you shouldn't do either way is let the glass touch the paper. Because while the glass would resist the thermal stress caused by air temp(hundred something degrees) direct contact with the paper means a couple hundred degrees.

Wow, I didn't even think to mention it, but you eerily mention all that I didn't even think to put down. :bow:

Where the paper burned, it turned into a black carbon type thingy, and this curled up and did touch the lenses. Also, the ink evaporated and left a burnt looking stain on the glass.

I wish I had a camera to show you guys the result. It cracked into 3 pieces.

 

[tebore]

Wow, I didn't even think to mention it, but you eerily mention all that I didn't even think to put down. :bow:

Where the paper burned, it turned into a black carbon type thingy, and this curled up and did touch the lenses. Also, the ink evaporated and left a burnt looking stain on the glass.

I wish I had a camera to show you guys the result. It cracked into 3 pieces.

The Mag85 isn't really for starting fire's anyway it's got a beautiful beam, color and runtime. If you really want a firestarter you gotta step up to 100+ watts to avoid holding the light too closely. Another risk is flash up when you remove the light to check the paper. The sudden rush of (cooler denser) air causes the paper to burst in to a large flame rather fast, it happened to me when I lit a fire with a Mag85. It was a rather weird occurrence.

 

[Illum]

a Mag85 can light paper is outside my knowledge.

I use thermal paper [available as a roll or bulk from office depot for CC machines and electronic calculators] for optimizing the tightest focus on the hot wires and also to study the hotspot intensity. yeah theres a black oily stain on the 85's borofloat window after every test [I test it face down].

It comes off easily with alcohol or just with a dry cloth, but good luck washing the stain off the cloth

 

[AzN1337c0d3r]

a Mag85 can light paper is outside my knowledge.

http://www.youtube.com/watch?v=FCrwelQUTMc

Yes, I know it's newspaper, but I assure you, my Mag85 can punch a hole through a sheet of regular computer printer paper. (Although premium superwhite brands tend to reflect more of the light and can't be ignited :shrug