This is a used Philips PF1 flashbulb. It used contain magnesium wool – now it contains magnesium oxide splattered over the inside, and the glass has cracked with the heat of the flash.
Flash!
This is a used Philips PF1 flashbulb. It used contain magnesium wool – now it contains magnesium oxide splattered over the inside, and the glass has cracked with the heat of the flash.
Jonathan Gazeley 