Can Pottery Be Made Too Thick? - Q and A

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ℹ️ About this video
Another FAQ session from my May livestream. This time I dive into thick pottery, how thick is too thick, why Maria Martinez pottery is so thick and the purpose of temper in clay.
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19 июн 2021

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Комментарии : 36

@brandengillette7794 2 года назад

I know you specialize in southwest pottery but it would be amazing if you did a special episode for the east coast potters, I read that some tribes here used beach sand or crushed shells for temper and some used ground quartz rock. And for decorating.. I'm not finding much in the way of slips and pigmentation, but mainly pressing the design into the surface of the pots with a stick wrapped with cord or cloth or netting material. Honestly I'm kinda bummed about the pigments because being in upstate NY I was hoping to find rocks the natives here used to decorate pots. So I'm going to have to do a whole lot of experimentation using random rock dust.

@AncientPottery 2 года назад

That would be fun, it might even be able to involve a trip to the east and some interviews with some experts at different museums. There must be pigment in your area, have you tried mindat.org

@reginacarroll8149 3 года назад

I really think it's great that you share your knowledge with us. Thank you, Mr. Ward?

@AncientPottery 3 года назад

You are so welcome.

@rustyshackleford3278 3 года назад

This was extremely helpful and answered a lot of questions, thanks Andy. P.S a reproduction of some Mogollon pieces (including how to make the pigments and the firing process) would be really interesting.

@AncientPottery 3 года назад

Thanks Rusty, I will consider some Mogollon focused pottery builds, I love Mogollon culture but they sometimes get treated like a red-headed step child by archaeologists. And remember, guns don't kill people, the government does.

@springbloom5940 3 года назад

Some of the native pottery from my area (Houston) has up to 60% sand content. My experience with this native clay, tells me they probably just used it raw, because everything Ive found around here has about 50% or more really fine, white sand content. After purifying it, I had to put almost all the sand back in it, to stop cracking and radical shrinkage. The raw clay is a medium grey and the processed stuff is a medium brown, very dense and feels like silly putty. Makes pretty good binder for play sand bricks, though.

@AncientPottery 3 года назад

Wow, that's some gritty clay. I imagine a lot of prehistoric people used the clay as they found it if it was too gritty then that was just the way it was. They may not have known how to remove the grit or even if they did, it may have been too labor intensive.

@springbloom5940 3 года назад

@@AncientPottery Its surprisingly smooth, because the sand is extremely fine. Almost powdery.

@ArDeeMee 2 года назад

@@springbloom5940 A good example of „don‘t fix if it ain‘t broken“. ;)

@jamiewolfzen Год назад

Is that true for all marine clays? Will clay from a foot down in a desert dry lake bed have lots of sand in it?

@6bonjour 3 года назад

Always helpful, thank you.

@AncientPottery 3 года назад

Glad you found it useful. Thanks for watching

@davidcarey8611 3 года назад

Andy I'm loving your shirt

@AncientPottery 3 года назад

Thanks David.

@mojavebohemian814 Год назад

thank you!

@AncientPottery Год назад

Welcome!

@bishnur3768 3 года назад

I love your explanation skills......

@AncientPottery 3 года назад

Thank you so much.

@clayfullmer 2 года назад

As a geotechnical engineer (student), yeah your spot on that clay has molecular water on it. Clay is really electro negative and there are hydrogen, really strong, bonds to that molecular water. In my classes we design clay liners. Water moves through clay at 10^-7 m/s naturally. That’s about 1/3” per day, so with a clay ball of multiple inches the math says it’ll take a lot of days to dry it, but even then the molecular water won’t leave unless you get some heat. Love the content. I’ll buy some of your course material when I graduate. I appreciate the free learning resources while I’m in school.

@AncientPottery 2 года назад

Thanks for that explanation. Glad to hear you are enjoying my content.

@zeahlessley6108 3 года назад

I love Jonathan Cross's work, some larger pieces have slabs several inches thick.

@AncientPottery 3 года назад

That’s awesome. I wonder if he has to use a lot of temper, of course firing in an electric kiln is much different because the temperature goes up so gradually.

@zeahlessley6108 3 года назад

@@AncientPottery I think he almost exclusively uses a wood fired kiln!

@ashleydoyle9794 Год назад

You might have already explained this in another video that I haven't found yet but does all clay make a ringing noise when fully fired? That's one of my favorite sounds but I haven't gotten any of mine to make it. I'm in the process of building an adobe kiln and waiting on a pyrometer in the mail. I might not be getting it hot enough still as I've just been using fire pit and guessing if it was done. I was able to hold water in one for a few hours.

@AncientPottery Год назад

Yes, the ringing tells you that you have made ceramics. You probably aren't getting hot enough, that is something that new students sometimes struggle with. Keep trying, m you will get it figured out and a pyrometer will definitely help. You should try to get it at least to 700 C.

@sethhofstetter8161 2 года назад

I wonder...why do bricks not "explode" when fired? I mean, it's thick clay with temper and a fiber of some kind...

@AncientPottery 2 года назад

Probably because of the same things I always tell people. Use plenty of temper and thorough pre-heat. But I am only guessing having never made a brick.

@marciacunningham5877 2 года назад

I worked for Acme Brick Co. Extruded bricks have Diesel fuel mixed in with the clay which lubricates it through the extruder, but also helps dry the bricks. The bricks go into a tunnel kiln which is a dryer at the entrance. They are THOROUGHLY dried as they move along. The temperature is then brought up very slowly and back down very slowly after the firing as the kiln car moves along. There is a very high percentage of grog in the clay. Michael

@edstud1 Год назад

Just wondering how you decide what you want to replicate and do you work from photos or drawings, etc.

@AncientPottery Год назад

It's mostly just whatever interests me. Sometimes they are pieces I have seen in a museum or maybe just something I saw a picture of on the internet. If possible I like to have measurements for the pot but I don't always have that and sometimes just have to estimate and guess for either size or designs.

@edstud1 Год назад

@@AncientPottery that's very helpful, I was wondering if you had special permission to measure and photograph pieces in the museums.

@AncientPottery Год назад

@@edstud1 no not usually, although I have been known to hold a measuring tape up to the glass.