Paul Lewing on fri 21 jan 05
I just got some MSDS's from a china paint company and I'm having a bit of
trouble understanding them. I wonder if anyone out there can help me. I got
them for a flux and five colors, and they came with a numbered list of
minerals. For each substance they give numbers corresponding (I think) to
the list of minerals with weight percentages. OK, that much I got.
But the numbers in no case add up to 100. Some ingredients they list as <5,
but even if I count those as the full 5, some of them only add up to about
85. Am I to assume that the rest is made up of stuff that's not on the
list?
Most of the stuff on the list might be considered hazardous, but other stuff
I wouldn't think was, like boron. And then there's some hazardous stuff
that I know they use that's not on the list, like vanadium.
One of the colors I know to be an iron red, but it lists no iron. However,
that one only adds up to 97%. Do I assume the other 3% is iron? That would
be about right for this color.
But why does that color list cadmium as an ingredient? In fact, almost all
of them list cadmium, even the clear flux, although it says it has less than
5%. The iron red has supposedly 5% cadmium, a bright antimony yellow has
5%, and a maroon has 20% cadmium. That last one I expected, but not the
other two. What gives?
Thanks, Paul Lewing
Elizabeth Priddy on sat 22 jan 05
There's a chance they are not giving you the straight dope because they don't want
you to just make it yourself.
You would probably find out the most by calling them directly.
Paul Lewing wrote:
I just got some MSDS's from a china paint company and I'm having a bit of
trouble understanding them. I wonder if anyone out there can help me. I got
them for a flux and five colors, and they came with a numbered list of
minerals. For each substance they give numbers corresponding (I think) to
the list of minerals with weight percentages. OK, that much I got.
But the numbers in no case add up to 100. Some ingredients they list as <5,
but even if I count those as the full 5, some of them only add up to about
85. Am I to assume that the rest is made up of stuff that's not on the
list?
Most of the stuff on the list might be considered hazardous, but other stuff
I wouldn't think was, like boron. And then there's some hazardous stuff
that I know they use that's not on the list, like vanadium.
One of the colors I know to be an iron red, but it lists no iron. However,
that one only adds up to 97%. Do I assume the other 3% is iron? That would
be about right for this color.
But why does that color list cadmium as an ingredient? In fact, almost all
of them list cadmium, even the clear flux, although it says it has less than
5%. The iron red has supposedly 5% cadmium, a bright antimony yellow has
5%, and a maroon has 20% cadmium. That last one I expected, but not the
other two. What gives?
Thanks, Paul Lewing
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wjskw@BELLSOUTH.NET on sat 22 jan 05
Paul:
Don't forget to add in the amounts of water used, or other fillers
that are not considered "active" or "hazardous" ingredients.
These can include clays, fillers, etc.
In most cases, they won't even be listed, though. The "total" for=20
all ingredients in the bag or jar must by law total 100%, including
water or other liquid suspenders, unlike our glazes, where you add
the ingredients to 100 (more or less ) and THEN add water. The
loophole is that not all the ingredients have to be there, if
they're considered "inactive", non-toxic, and such. It was FDA and
OSHA's nod to manufacturers trying to protect their "proprietary
trade secrets" from what I've read.
Best,
Wayne Seidl
The MSDSheet book in our office is required by OSHA for every
chemical we can use/have used. It now=20
contains just over 650 pages! Time for a bigger binder :>(
This in addition to the binders we're required to maintain in each
location we work, listing all the MSDSheets for the chemicals we
currently use, or encounter on site. We're drowning in paperwork.
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Paul
Lewing
Sent: Friday, January 21, 2005 10:12 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: MSDS's
I just got some MSDS's from a china paint company and I'm having a
bit of
trouble understanding them. I wonder if anyone out there can help
me. I got
them for a flux and five colors, and they came with a numbered list
of
minerals. For each substance they give numbers corresponding (I
think) to
the list of minerals with weight percentages. OK, that much I got.
But the numbers in no case add up to 100. Some ingredients they
list as <5,
but even if I count those as the full 5, some of them only add up to
about
85. Am I to assume that the rest is made up of stuff that's not on
the
list?
Most of the stuff on the list might be considered hazardous, but
other stuff
I wouldn't think was, like boron. And then there's some hazardous
stuff
that I know they use that's not on the list, like vanadium.
One of the colors I know to be an iron red, but it lists no iron.
However,
that one only adds up to 97%. Do I assume the other 3% is iron?
That would
be about right for this color.
But why does that color list cadmium as an ingredient? In fact,
almost all
of them list cadmium, even the clear flux, although it says it has
less than
5%. The iron red has supposedly 5% cadmium, a bright antimony
yellow has
5%, and a maroon has 20% cadmium. That last one I expected, but not
the
other two. What gives?
Thanks, Paul Lewing
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