X-ray lead for casting?

[coloradoclyde]

High blood lead levels in adults are associated with decreases in cognitive performance and with psychiatric symptoms such as depression and anxiety

How you feeling today??
Bummed out ...worried???

 

[54ball]

It's been proven scientifically that living in a laboratory causes cancer in rats. :hmm:

 

[coloradoclyde]

It is also been proven that some people will take good information and do good things with it.....and some people will take good information and do bad things with it.

Question everything.

 

[tom deinek]

FWIW, I have a client who has a scrap metal yard & I asked about dental sheathing this morning. He must scan all incoming scrap for radiation pursuant to state law. He routinely refuses dental lead and says it requires labeling as Class 7. The adjoining yard is licensed to handle such material and processes all dental/hospital sheathing that comes to either yard. First step in processing sequestration and secondly labeling with hazardous material advisory icons.

Anything labelled Class 7 cannot be mailed under USPS rules, or so my internet inquiries show.

Again, FWIW. I'm not qualified to opine further.

 

[necchi]

Go back and ask him what "Class 7" means

 

[Zonie]

Class 7 is what the junk yard owner never passed to get to class 8 and graduate. :rotf:



OK. I apologize to any of our members that own a junk yard, but you got to admit it was kind of humorfull. :grin:

By the way, Class 7 material is radioactive material.

If the recycleing center guy (There, I didn't say junk yard) uses a geiger counter to measure the lead for radioactivity he would find it is not.

Not unless someone included a container that was used to transport radioactive material. These containers are usually made of lead too and they often end up with small amounts of the radioactive material (isotopes) left in them

If we are speaking about these small containers we're talking about a whole different ball game.

We are also talking about someone breaking Federal laws about handling and disposing of these containers.

By the way, even with these lead containers that are used to transport medical (and other) radioactive isotopes, the lead is still not radioactive but any trace of the isotope (even small dust) is.

 

[coloradoclyde]

Uncle Jim,
I saw a microwave oven at the junk yard the other day. Aren't they radioactive too.

Sure glad I was wearing my tinfoil helmet.


Opps! sorry I bumped a key on my keyboard.

 

[zimmerstutzen]

I was given about ten pounds of "cut offs" supposedly from installation of an x-ray room. Only about 1/6th thick and it was some kind of alloy. I could scratch it with my thumbnail but only with great pressure.

 

[RonRC]

It's been proven scientifically that living in a laboratory causes cancer in rats. :hmm:

Zonie and others have concisely, clearly and correctly explained that the lead in question will not be radioactive simply because it has been exposed to radiation.

Yes, there are chemicals tested only in the lab for toxicity in rats and mice, but with lead, the actual, physiological, cellular and enzymatic processes are well known and characterized.

Lead, is toxic, not in the form of lead bullets or balls, but as small particles in air and dissolved in water. For example of the depth of knowledge about lead: “The direct neurotoxic actions of lead include apoptosis, excitotoxicity, influences on neurotransmitter storage and release processes, mitochondria, second messengers, cerebrovascular endothelial cells, and both astroglia and oligodendroglia.” (Lead neurotoxicity in children: basic mechanisms and clinical correlates. 2003. Lidsky and Schneider. Brain, A Journal of Neurology)

Lead (like cadmium), in contrast to other metals like zinc, copper and iron, has no known useful function in any living organism. That is one reason it is toxic at low levels.

Lead has been shown to induce encephalopathy (brain damage which manifests as confusion, coma and seizures), anemia, neuropathy, and Fanconi syndrome (kidney disease- progressive interstitial nephritis). The damage to kidney cells from lead exposure can be seen under the microscope.

Lead disturbs multiple, critical enzyme systems in cells. It disrupts the heme production for hemoglobin. Because heme is essential for cellular oxidation, deficiencies have far-reaching effects. Lead binds quickly to red blood cells. Lead has a half-life of approximately 30 days in the blood, from where it diffuses into the soft tissues, including the kidneys, brain, liver, and bone marrow.

Perhaps the organ of most concern is the child’s developing brain. Effects on the brain appear to continue into the teenaged years and beyond.

Again, this is not the lead in bullets and balls, but forms of lead that will dissolve in water and be carried in air to be inhaled. If you eat lead balls or bullets, your stomach acids will dissolve some of it and you might have a problem. However, most of us don't eat lead balls. :wink:
Ron

 

[bpd303]

I've been casting lead balls/boolits for over 60 years and to date I don't have any drain bamage. :grin:

 

[smo]

Irradiated lead is not radioactive.

The thing that can make something radioactive is if a small piece of the radioactive material gets on something. Only then will whatever it is become radioactive and even then, the contaminated object is not giving off the radiation. It's the piece(s) of radioactive material that gets on it that makes it radioactive.

.
Correct ! Or as we say in the Biz radioactive material in an unwanted place = Contamination Contamination is what you can spread around and get on your body

 

[Scota4570]

There can never be any contamination issue with x-ray shielding from the dentist's office. There is no radioactive material present! The X-rays are generated by a special type of vacuum tube. That is a fact.

I can speculate that hasmat rules classifying shielding lead is a catch all bureaucratic thing. Believe it or not many law makes and admin law folks are not qualified to make such rules. No really... It is true....really.

 

[Billnpatti]

Amen, brother! Amen! I have spent a lot of time dealing with government rules and regulations. Believe me, there are folks making knee jerk rules and regulations that don't know their a** from their elbow about the things for which they are making rules. Is it any wonder that so many government regulations don't make sense? :youcrazy:

 

[coloradoclyde]

Is it any wonder that so many government regulations don't make sense?

What are the minimum educational requirements for law makers?

Who actually writes the laws that are introduced?

Who actually reads them before voting?

 

[azmntman]

and how the hell did they get outta third grade? :shake:

 

[Rick Boylan]

Who said they did? :haha: