Many of thee toxins are stored in human fat tissues. Year later when you
lose body fat they are released and bingo, liver failure.
My boss from years back worked in motor repair and claimed they used to
"bathe" in the stuff. It never hurt anybody he knew. Within two sent3nces he
talked about so-and-so dropping dead for some mysterious reason...LOL
We have been through some nasty chemicals. Internet and safety processes
brought about by unions has helped a lot to create awareness.
Carbon tet is a cumulative liver poison. Dad used it often enough to get
small stains out. Died at almost 93 from brain atherosclerosis and its
I decided to join you at Google U. Sadly, we ugly Americans seem to
spell it as we will, refer to it as we will. While I was able to find
a few odd references to the usage of "y" in the mix, the "e"s and "i"s
seem to be used even in the sites owned by suing attorneys with wild
Not so. When attending Google U classes, you must read as much
material as you can stand. The dry cleaning agent used widely by the
industry in the 30's (benzine? benzene? benzyne?) fell out of favor,
but didn't disappear.
In fact, small shops found it to be a cheap and effective method of
cleaning, and apparently used it until meeting OSHA goals became
From I L Feitshans
Johns Hopkins University School of Hygiene and Public Health,
Baltimore, MD 21205.
Regulatory History of Benzene Exposure in the U.S.
The first evidence of risk from acute or chronic effects
for exposure to benzene was recognized in 1900 (13). According
to OSHA, "the benzene-leukemia link was first
identified in 1897 in a report on the leukemia death of a
worker occupationally exposed to benzene" (14). Winslow
recommended a 100-ppm exposure limit in 1927 (15). Benzene's
long regulatory history began in 1934, when Massachusetts
established a Division of Occupational Hygiene
in its Department of Labor and Industries (16) to
investigate benzene toxicity. Based upon reports by Bowditch,
Hunter, Mallory, and Elkins (17), it set a "maximum
acceptable limit" (MAC) of 75 ppm, which was soon
reduced to 35 ppm.
In 1946, the American Conference of Government Industrial
Hygienists (ACGIH) recommended a threshold
limit value (TLV) of 100 ppm for benzene, which was lowered lowered
to 35 ppm in 1948 and 25 ppm in 1963 (18). In 1971,
OSHA adopted the voluntary industrial limit of 10 ppm,
set by the American National Standards Institute (ANSI)
as part of its acceptance of "national consensus standards"
(19). In that same year, the International Labor
Office (ILO), a specialized agency of the United Nations,
adopted ILO Convention number 136, "Convention Concerning
Protection Against Hazards Arising From Benzene,"
which incorporated the ACGIH's standard and set
an international ceiling of 25 ppm for occupational exposure.
A follow up on the adoption of using benzene in the dry cleaning
industry reveals that a large group of cleaners didn't move from using
benzene as a cheap and effective agent for business, but simply used
safer handling techniques.
Apparently (your Google search terms may yield different results) the
industry moved away from benzine for good after the 1963 ruling to
lower the recommended count of 33 ppm in 1963. Since at that time
OSHA had little or no enforcement capability at that time, it is
unclear exactly how long it took the industry to move away from
No doubt you found that it is still used for cleaning in certain
No doubt you found it is still used in manufacture of certain goods.
In the end, I think I just don't care.
Well, I tried a couple of experiments. I found out that 50% isopropyl
does have some effect on both Varathane and tung oil.
I had intended to make a sample and set it aside for a year and see what
happened, just for my one information, but in the process of doing that,
I found that I had enough material to get some answers.
There was some dried stain on the bare (Harbor Freight jummy-)wood
handle of the disposable brush I had used to apply it last time I used
it. It had been there for more than a month so I think it was as cured
as it's going to get. I tried alcohol on that. As expected, the stain
on the surface came right off but that down in the grain wasn't touched.
I poured alcohol on the handle and let it sit until it had nearly all
evaporated then tried rubbing and it still did not remove the stain down
in the crevices in the grain. I found a couple of drips on the bench
top. I went after one of those with alcohol and it cleaned off with
some effort. I tried the other one with a bare towel and it also came
off, but in flakes that shook off of the towel rather than as a
I got out the bottle of tung oil (been years since I had touched it--had
a child-safe cap on it and wasn't _that_ fun) and found that it had some
runs and fingerprints and whatnot on the outside of the bottle. I tried
wiping the runs and fingerprints and whatnot off with a towel and
scraping them with my fingernail and neither removed them. So I wiped
it down with a rag and alcohol and it again took some effort but it did
Conclusion--50% isopropyl will dissolve both Varathane Premium stain and
100% tung oil, but it is not particularly agressive about doing either
and doesn't remove the stain from the indentations in the grain.
Now as to whether it should have "removed" the finishes, I'd really need
to see the piece I think.
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