CRT TV Disassembly Safety: Lead & Phosphors

  • Thread starter Thread starter AcidRainLiTE
  • Start date Start date
  • Tags Tags
    Crt Lead Safety
Click For Summary

Discussion Overview

The discussion revolves around the safety concerns associated with disassembling CRT (cathode ray tube) televisions, specifically focusing on the dangers posed by lead in the glass and phosphors on the screen. Participants explore the implications of handling these materials during disassembly and the potential health risks involved.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant expresses concern about the dangers of lead and phosphors in CRTs, questioning the risks associated with touching phosphors and the implications of lead if the tube were to implode.
  • Another participant reassures that there are no respiratory or radiation hazards from phosphors unless they enter the bloodstream, but emphasizes the need to treat them with respect.
  • A participant cites a source warning against touching phosphors, indicating a strong perception of their toxicity and the need for medical attention if contact occurs.
  • Discussion includes references to the toxicity of cadmium and barium in CRTs, with a suggestion to avoid breathing dust from broken tubes.
  • One participant highlights the importance of recycling CRTs due to lead toxicity and the potential dangers of residual electrical shock from disassembly.
  • A participant questions the level of concern regarding lead, suggesting that its solubility is low and comparing it to lead shot in waterways.

Areas of Agreement / Disagreement

Participants express varying levels of concern regarding the toxicity of phosphors and lead, with some emphasizing caution and others questioning the severity of the risks. The discussion remains unresolved regarding the extent of danger posed by these materials.

Contextual Notes

Participants reference different sources and personal experiences, leading to a range of interpretations about the safety of handling CRT components. There is uncertainty about the actual health risks associated with lead and phosphors, as well as the proper disposal methods for CRTs.

AcidRainLiTE
Messages
89
Reaction score
2
I recently disassembled my Big Screen CRT projection tv. I have been well aware of the danger of the capacitors in CRT TV's and I managed to take the TV apart and remove the capacitors all without killing myself. However, I was doing some more reading online and it seems there is another danger: the phosphors on the screen and the lead in the CRT glass. I assume the lead is not a problem unless the tube implodes and pieces get embedded in your skin, correct? My main question is about the phosphors. It is only a problem if you actually touch the phosphors right? I did not touch them, but I tried to remove the glass that was covering them, and was thus working around them. What I did was the following: First I removed the 3 lenses (there are 3 separate CRT's [one for each color--red,blue,green] and there is a lens on top of each of them), then I was curious about what was behind the lenses. I saw that there was a piece of curved glass in front of the phosphor screen and so I proceeded to take it off (i.e. remove the screws that were sealing it on), I wiggled it around a little trying to get it off and managed to pull the thing up a little but I couldn't get it entirely off. I got a very strong feeling that I should not be trying to remove it and so I gave up. I never actually touched the screen, though I am a little worried since I pulled back the piece of glass that covers it. So, I am just double checking, is there anything to be worried about (other than the fact that the three CRT tubes sitting on my bed are essentially bombs waiting to implode)?

Thanks.
 
Engineering news on Phys.org
If it's any sort of respiratory or radiation hazard that you're worried about, relax. Neither exists. The phosphors would probably cause some damage it they got into your bloodstream, but are otherwise harmless. I'd be a lot more concerned about flying glass.
Regardless, they should be treated with the utmost respect.
There are medical specialists here that can tune you in better than I can.
 
Thanks for the reply.
Yeah, the only reason I was worried was because this site made it sound like the world would come to an end if I came into contact with the phosphors:
"NEVER touch a CRT’s phosphor coating; it is extremely toxic. If you break a CRT, clean up the glass fragments very carefully. If you touch the phosphor, seek medical attention immediately" --http://www.tpub.com/content/fc/14098/css/14098_56.htm
 
Also, since the lead is toxic, you are generally required to recycle the CRT, rather than just throw it (them) in the trash. Please find a recycler near you that can accept CRTs. And yes, please be careful handling them. If you get a residual shock from the anode button and drop one, it would be very bad.
 
why do people freak out about lead? eating paint chips is one thing, but the solubility is pretty low. our waterways are full of lead shot from fishermen.
 

Similar threads

Replies
66
Views
10K
Replies
12
Views
9K
Replies
6
Views
4K
Replies
6
Views
2K
  • · Replies 5 ·
Replies
5
Views
26K
Replies
7
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 10 ·
Replies
10
Views
5K
  • · Replies 3 ·
Replies
3
Views
18K
  • · Replies 8 ·
Replies
8
Views
1K