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I think these are porcelain but I’m really unfamiliar with dating something based on style. I’m guessing 70-80’s but I’m also struggling to accurately describe them. Is this a special type of porcelain with the two tone white/color or are there any better words? Maybe it’s not porcelain at all? (they are breakable glass)
My last struggle. I’m not sure if I should lot them up all together, sell individually, or by size.
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Most likely not porcelain.
Porcelain is made out of special white clay called Kaolin almost all found only in Japan. Even Limoge and Lennox china and any French and English Fine Porcelain china uses the kaolin clay and they have to import it.
Now in most cases but not all, most real porcelain is thin and though it is white, most thin porcelain is also slightly transparent. One of the field tests or at home tests is to hold the item with fingers on both sides, hold the item up to a bright light or open window and you should be able to see a slight shadow of your fingers on the other side. But there are exceptions.
First, I would like to suggest you go to Wikipedia and do a search on porcelain. That will repeat some of what I have just said and also give you a better understanding of the process.
porcelain because of the Kaolin clay can be fired to higher / hotter temperatures and by doing that, it also makes the porcelain harder and less prone to chipping.
There are other interesting facts online, even a specialized site just on porcelain.
Your items are probably just plain white clay ceramic and glazed one side. And dollars to donuts have no transparency for several reason.
As to dating, depends if they are original or reproductions and who made them. You did not say or show the bottom of them in a clsoe up so are there any names or marks of any kinds, symbols, numbers etc.. Many like these were made out of Melamine or Phenolic [plastic resin] but those are light weight, finish is usually dulled down and is fairly easy to tell by tapping with your finger nail and you will hear that typical plastic dull sound.
Hope this helps somewhat. As to type, brand or value u would have to research some more on WorthPoint of Pinterest but there are over 4500 on Worthpoint alone.
Mike at MDC Galleries
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Just a note: Kaolin is found in other places too.
https://en.wikipedia.org/wiki/Kaolinite#OccurrenceFound in your backyard, Mike!
In the US, the main kaolin deposits are found in central Georgia, on a stretch of the Atlantic Seaboard fall line between Augusta and Macon. The deposits were formed between the late Cretaceous and early Paleogene, about 100 million to 45 million years ago, in sediments derived from weathered igneous and metakaolin rocks.Kaolin production in the US during 2011 was 5.5 million tonnes.
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Well I’ll be horn swoggled. Ding dang it! Right here! What do ‘ya know. Well I have been quoting the source as only in Japan for a long time and so has some other antique boothers. Maybe because of some of the research we have done on the Limoge France and Made in England items.
Maybe historically for the older pieces that are turn of the century and earlier the Georgia Kaolin was not a source during those times. Will have to research on the history of the Georgia Kaolin and also see who are their buyer / mfg. that use it and what products they make and under what names. I would be interested to know some of that data.
I will certainly bring that up when I see a couple older antique guys at the next auction in a few weeks.
Okay..then onward and upwards, but I think we at least helped Ashana somewhat.
thanks again guys for what all you do and provide. Wish we just had our youth and energy back we used to have.
Mike at MDCG in ATL
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Well it ceratinly is found in many places as the Wiki article says But also I see the reference to Providence Canyon. That is about 30 miles from my home town Columbus, GA. It is out past Fort Benning a little distance. I have been there several times in my late teens and even been down and explored the Canyon bottom for miles with friends. It is like a small version of the Grand Canyon. We went down by rope further up and walked for the whole day. But they also have a walk down trail.
It ceratinly has layers and now that I read this I remember all of the alternating layers of clay. We walk in a stream bed that had walls on each side, that we very slick clay. You can see very nice pictures of Providence Canyon on various web sites, some in color. Gorgeous place.
Well so much for scarce sources of Kaolin, but it is used in fine china and porcelain and as I said, some fine porcelain is slightly see through also.
mike at MDCG
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Oh neat! Thank you for the information. I’ve done little research in glassware, but I seem to keep picking it up.
I’m struggling most with how to find enough keywords for the title. I think they are really cool, and I can visualize the buyer. These have no markings, Only an ascetic. I was hoping they might have had an iconic style name I was just ignorant to. That’s okay, I’ll just be generic.
Thank you!
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Total sidenote — Arkansas’s Nilaok pottery (most commonly seen in the “mission swirl” style) gets its name from “Kaolin” spelled backwards.
http://www.encyclopediaofarkansas.net/encyclopedia/entry-detail.aspx?entryid=586
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