rockyit98
Hazard to Others
Posts: 283
Registered: 12-4-2019
Location: The Known Universe
Member Is Offline
Mood: no mood is a good mood
|
|
why still lead in paints that are labeled "Lead Safe" ?
A bit while back I repainted with Red floor paint that was labeled "child safe" but also had markings that read "600 mg/L " of lead in the paint. I
was not worried since it was for outdoor use but why even that? can we just done with lead in paints. I still use 60/40 solder but I collect most
droplets of "waste" tiny drops. solder is much safe since even surface got oxidize its mostly SnO and wash hands very well. I think that we should
eliminate Pd from consumer products even car batterys . what do you think?
"A mind is a terrible thing to lose"-Meisner
|
|
|
Metacelsus
International Hazard
Posts: 2531
Registered: 26-12-2012
Location: Boston, MA
Member Is Offline
Mood: Double, double, toil and trouble
|
|
Yeah, 600 mg/L of lead does not sound like "safe" to me!
I wouldn't be too worried about lead in car batteries since it stays there, but paint is a big concern.
|
|
|
UC235
National Hazard
Posts: 565
Registered: 28-12-2014
Member Is Offline
Mood: No Mood
|
|
Lead paint is considered >5000mg/kg dry weight. So while it does contain some lead, it is probably well below that limit. I would expect that it is
not deliberately added but comes from contamination in the other pigments/opacifiers used.
|
|
|
Fulmen
International Hazard
Posts: 1693
Registered: 24-9-2005
Member Is Offline
Mood: Bored
|
|
No, I'm pretty sure it's added deliberately. Some lead compounds are excellent siccatives (curing accelerator) as well as strong and durable pigments.
We're not banging rocks together here. We know how to put a man back together.
|
|
|
RustyShackleford
Hazard to Others
Posts: 195
Registered: 10-12-2020
Location: Northern Europe
Member Is Offline
|
|
Perhaps its in a biounavailable form.
|
|
|
S.C. Wack
bibliomaster
Posts: 2419
Registered: 7-5-2004
Location: Cornworld, Central USA
Member Is Offline
Mood: Enhanced
|
|
...and the joyous men threw off their hats and sang their safety song and danced their safety dance, as a recycler chucked batteries into the fire
while wondering why everyone is so stupid.
|
|
|
Metacelsus
International Hazard
Posts: 2531
Registered: 26-12-2012
Location: Boston, MA
Member Is Offline
Mood: Double, double, toil and trouble
|
|
OK, I should clarify: it stays there assuming people aren't idiots. Of course, some people are idiots.
Still, it's not like paint, which is directly exposed to the environment.
|
|
|
Sulaiman
International Hazard
Posts: 3558
Registered: 8-2-2015
Location: 3rd rock from the sun
Member Is Offline
|
|
lead occurs naturally in soil, 15 to 40 ppm,
https://ag.umass.edu/soil-plant-nutrient-testing-laboratory/...
So pollution should be considered relative to that
CAUTION : Hobby Chemist, not Professional or even Amateur
|
|
|
kryss0
Harmless
Posts: 1
Registered: 10-1-2016
Member Is Offline
Mood: No Mood
|
|
Also depends on wether its described as Total Lead or soluble lead, limits for Total lead will be a lot higher than those for soluble lead.
|
|
|
rockyit98
Hazard to Others
Posts: 283
Registered: 12-4-2019
Location: The Known Universe
Member Is Offline
Mood: no mood is a good mood
|
|
lead makes people stupid, stupid people use lead stupidly , now that's a positive feedback loop.
"A mind is a terrible thing to lose"-Meisner
|
|
|
Praxichys
International Hazard
Posts: 1063
Registered: 31-7-2013
Location: Detroit, Michigan, USA
Member Is Offline
Mood: Coprecipitated
|
|
To add to this, widespread use of leaded gasoline has contaminated roadside soils, though these hotspots are gradually diluting in countries where
leaded gas has been phased out.
https://pubmed.ncbi.nlm.nih.gov/15074616/
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
