Fredrick Paget on tue 16 mar 04
I wonder what color plutonium oxide would produce in a glaze.
There are 10 or 12 as yet untried elements beyond uranium in the
periodic table. Some have never been made in enough quantity to even
see the tiny speck that was made. Others like plutonium have been
made in quantity.
These elements form the actinum series starting with thorium that
has some resemblance to the rare earth lanthanum series. As we all
know there are several rare earths that make interesting colors.
Others are colorless or color is seen only under UV .
What interesting colors may lie out there in the actinides? Uranium
is the 3rd member of this series and we have been reading about all
the colors it makes.
Any one know if thorium makes color? I believe the oxide is white as
it is the material that the Wellsbach mantles used in Coleman
lanterns are made of after the lantern has been lit and the silk
carrier of the mantle is burned away leaving the fragile mantle. It
is a naturally occurring element and is found in monazanite sands. I
would not be surprised if there were some in the rutile we get.
Glow in the dark anyone?
Fred
--
From Fred Paget, Marin County, California, USA
fredrick@well.com
Krista Peterson on wed 17 mar 04
>Glow in the dark anyone?
There are glazes that glow in the dark, I found this website www.glowingglaze.com.
They are low fire crackle glazes, I have no idea what's in them but would like to try
them out someday. Has anyone tried them?
Fred, where do you get your info on these oxides? clay magazines or science magazines?
Take care
Krista Peterson
Fredrick Paget on wed 17 mar 04
Dear Fred,
\\\\\\>Now just imagine the hues which are possible and tell me which of
>these cannot be compounded from the current range of Transition or
>Lanthanide elements.
>\\\\Ivor Lewis
Ivor, You have put me in mind of a great idea. I should get a report
in to Clay art at the first of next month.
Fred
--
From Fred Paget, Marin County, California, USA
fredrick@well.com
Ivor and Olive Lewis on thu 18 mar 04
Dear Fred,
Even if you get over the problems of emissions and toxicity there is
the fact that most of them would settle in seconds in any of the media
we use. Hellish density to cope with.
Now just imagine the hues which are possible and tell me which of
these cannot be compounded from the current range of Transition or
Lanthanide elements.
Great idea but impractical for many reasons.
I think we are both suffering from N...... deprivation. Or have you
gone to Indi... Or are all the"Cats Away"
Best regards,
Ivor Lewis. Redhill, South Australia
Fredrick Paget on thu 18 mar 04
>Dear Fred,
>Adobe, Corel and the other image programs give us these 16 million
>"Colours". Tell us you have got that all worked out for ceramic inks
>which can be printed onto decal paper for "On Glaze Transfers" or
>undergalze "Off Prints"
>I await with baited breath.
>Best regards,
>Ivor
Ivor,
This goes a little off topic but I don't think that you can get
16 million colors in subtractive printing. The 16 million refers to
the additive colors in a computer monitor which blends red, green,
and blue light (RGB) to get them. Even then there are colors that are
outside of the 16 million gamut.
Subtractive colors use inks or pigments on a surface and are
seen by reflected light. The common subtractive primaries are cyan,
yellow, and magenta, and black added to get a better black than you
get with the 3 primaries (CMYK). You can use other colors for
primaries and in fact some of the newer printers are using 5 or 6 to
get a more inclusive color gamut.
The idea is to get primaries that form the apices of a
geometrical figure on the CIE color diagram that encloses the maximum
number of colors. The color diagram has the appearance of a section
of an ellipse so with three primaries you are trying to lay a
triangle on top of a slice of an ellipse where the apices have to lie
within the ellipse to enclose the most colors, Any area outside the
triangle is out of gamut and can't be made with the 3 primaries. Also
you can't make a white or metallics like gold. They have to be added
separately if you need them.
In ceramic stains we have only a limited pallet and the higher
we fire, the fewer colors we have. I don't see us ever getting close
to 16 million colors. Our available primaries are going to enclose a
rather scrawny figure on the color diagram, That is to say that they
have a poor gamut.
Now there are a lot of people working on this for ceramics. A
German, name of Zimmer, has a set of three toner cartridges for sale
that work in a Canon color laser printer to give a fair color image
gamut. They are very expensive and I don't afford them.
Regards
Fred Paget
--
From Fred Paget, Marin County, California, USA
fredrick@well.com
Ivor and Olive Lewis on fri 19 mar 04
Dear Fred,
Adobe, Corel and the other image programs give us these 16 million
"Colours". Tell us you have got that all worked out for ceramic inks
which can be printed onto decal paper for "On Glaze Transfers" or
undergalze "Off Prints"
I await with baited breath.
Best regards,
Ivor
Ivor and Olive Lewis on sat 20 mar 04
Agreed Fred,
But what are these new colours you have in your imagination that would
derive from the Actinide series or additional elements of the Trans
Uranic series? Or would be incited by my suggestion of the Transition
element and the Lanthanide element series.
You said I had given you a good idea.
So young lad, "fess up". Illuminate for the rest of us.
Best regards,
Ivor Lewis. Redhill, South Australia
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