Printable Version of Topic

Posted by: 1970 Neun vierzehn Sep 25 2006, 03:00 PM

If you look very closely, you will see very small accumulations of what appears to be fine white powder on the inside surface of my Cibie H-4s. It does not seem to adversely affect the lighting characteristics, however. If you tap gently on the lense surface, it sometimes drops to the bottom of the h/l shell. Any ideas?


Attached image(s)

Posted by: mihai914 Sep 25 2006, 03:05 PM

Probably dust or remains from a broken light bulb. I washed the inside of the Bosch H-4s I have with some warm soapy water and then placed it in the sun to dry, they came out pretty clean and it didn't affect the reflective finish.

Posted by: Eric_Shea Sep 25 2006, 03:09 PM

Smuggler...

Busted!

Posted by: Spoke Sep 25 2006, 03:13 PM

I did the same thing with the headlamps for an '86 Audi that I had. The fixtures had a dust haze accumulation on the inside. Took the fixture out and washed with warm soapy water. Rinsed clean and then dried it with a hair dryer pointed into a 1 inch diameter plastic hose to direct the warm air into the fixture.

Spoke

Posted by: So.Cal.914 Sep 25 2006, 03:13 PM

Fairy dust.

I've seen it in light bulbs before but I haven't the faintest idea.

Posted by: 1970 Neun vierzehn Sep 25 2006, 03:17 PM

Mihai,
A bulb has never broken in the h/l as yet. This substance is white. I've never seen "dust" white like this.

Eric,
I just knew someone would insinuate some illegal activity associated with this post.

Posted by: Aaron Cox Sep 25 2006, 03:23 PM

snort it. you may get lucky. but you may die too.

interesting choice

wash em

Posted by: kwales Sep 25 2006, 07:30 PM

Wash with soapy water,

Rinse well, final rinse with distilled,

Pour in a bottle of rubing alcohol- as high a proof as you can find, slosh around to absorb water, pour out, place in sun to evaporate alcohol.....

and.... no spots!!

(old telscope optics cleaning trick)

Ken