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Marcia Selsor

Member Since 16 May 2010
Offline Last Active Today, 10:09 PM

#63632 Burkes Strong Celadon

Posted by Marcia Selsor on Today, 04:04 PM


I think Ty has something. 

Although Glenn Nelson's base for ^6 has 64% Custer Feldspar, no silica 18 whiting , 9 ball clay 5 talc. That is it.

Here are some  celedons I used in Reduction and one for ^6 Oxidation

They all have much more silica 

Celedon^6     Reduction

Whiting  18.5

Neph. Syn 25.8

EPKaolin 18.8

Silica 31.1

Gerstley Borate               4.6

Red Iron Oxide      1.5           


AACC Celedon Cone 6

Color: light to medium green Tested

Surface texture: glossy

Type of firing: Reduction Glaze type: Ca


Ingredients: Percent Batch

Flint                       31.00   1550

Nepheline Syenite 30.00   1500

Gerstley Borate 21.00       1050

EPK Kaolin     10.00          500

Whiting            8.00           400

Totals 100.00 % 5000 gm


Also add:

Iron Oxide 1.00 50



May use up to 3% Iron oxide to intensify color


Possible Health Hazards:

Flint: free silica-wear a NIOSH approved dust mask when handling dry material

This is one for Oxidation
Selsor Faux Celedon ^6 Oxidation

Whiting 18.5
Neph Syen 25.8
EPK 18.8
Silica            31.1
Gerstley B     4.6
Copper carb 0.3
Mason #6600 Black 0.02

#63614 Quality Of Firing In Short Kiln Vs Tall

Posted by Marcia Selsor on Today, 06:24 AM

Congratulations. I think you should go visit one. I am 65 and I have a big oval. I use 2 cinderblocks to stand on to load it. The 18" kiln seems low to me. You could raise that height by putting it on cinderblocks. Go to a show room and feel what it is like to put a shelf into it. You could probably adjust the height for comfort for your back. The firing should be fine. That is a good company.



#63324 Scaling Down Terra Sig

Posted by Marcia Selsor on 26 July 2014 - 06:50 PM

Here is a way and fast way to make #simple Terra Sigillata:

                        Fill a plastic liter bottle with 3/4 full of water. Add 100 grams of ball clay and a couple drops of Darvon 7, or Darvon 811 or sodium silicate. Add more water until the bottle is almost full. Put the top on tight and shake well. Let the mix set for an hour or so..until you see three separate areas of the mix. Clear, light and dark. If the top layer is completely clear, add more Darvon. You want some color in the top layer. Punch a hole at the bottom of the middle layer and let it squirt into a bucket.  Wait  until your piece is bone dry and apply to the piece with a soft brush. Burnish after each application. I use a soft sponge for burnishing. You can apply several coats as until it is shiny. Too much Terra sig can lead to peeling or cracking. Bisque to Cone 09 or 1670 F or 901 C

#62769 Paper Clay Uses

Posted by Marcia Selsor on 19 July 2014 - 08:34 AM

you need to test a few things. First, according to some ideas, paper clay needs to go a cone hotter than the clay the paper was added to.

terra sig can seal but it would need to be tested because all clays that make terra sig will have various vitrification temperatures. 


I mix paper clay in slip made from my scrap. I wouldn't put it in my de-airing pug mill because it would clog the screen. I have a lot of porcelain paper clay sheets and I am ready to start some new ideas. No functional work. 



#62629 How Fast Do You Run Your Wheel When Centering?

Posted by Marcia Selsor on 17 July 2014 - 03:05 PM

I prefer slow wheels. Centering may depend on the thrower, but too fast can hinder success in my opinion.



#62572 Image Envy ...

Posted by Marcia Selsor on 16 July 2014 - 05:59 PM

I think the tires would be great in a Tire shop like Bridgestone or Michelin.


#62570 Non-Legal Ways To Address Copying Issue

Posted by Marcia Selsor on 16 July 2014 - 05:17 PM

I went to your website and you do have lovely work. But the flower forms are identical to some I bought from a friend in Italy. Porcelain paper clay by Antionella Cimatti

I think it is merely coincidence. My friend is an instructor of design, has won awards at the Korean International shows, and it is a simple flower form. She makes these in various sizes and puts them into various constructions as well as uses them in jewelry.She has nice hand made boxes for them. 

And she has been in ceramics for decades. So how would you respond to someone making extremely similar forms and probably before you made them. Sometimes, nothing is new in clay.



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#62467 Pencils To Mark Clay & Glaze Samples?

Posted by Marcia Selsor on 15 July 2014 - 07:39 AM

Jean Otis made her own ceramic "leads " for mechanical pencils using Mason stained colored clays. She fired them to a low bisque and inserted them into th pencil. She used the small hand extruder to form the leads.

BTW Jean demonstrated these at an NCECA many years ago. She shared.



#62462 Raku Glaze For Red Clay?

Posted by Marcia Selsor on 15 July 2014 - 07:06 AM

Have you fired this red clay in raku before? It may not have the thermal shock requirements you need for raku if it is a tight earthenware body.
Just a thought.

#62425 Where Is The Line For Intellectual Property Rights Vs. Copying Others

Posted by Marcia Selsor on 14 July 2014 - 02:27 PM

Paul Soldner used a stamp made from an impression of his naval to sign his work. He said everyone has one but none are the same.

#62381 Good Days, Bad Days

Posted by Marcia Selsor on 13 July 2014 - 07:30 PM

maybe tomorrow will begin some sculpture. Yes I have a heat gun and a blow torch. But I found after trying those, that this seemed like a natural progression. I liked shaking them into a nice form...upside down.

#62369 Good Days, Bad Days

Posted by Marcia Selsor on 13 July 2014 - 05:21 PM

I had a sucky day in the studio throwing some big orbs and having them start to sag before I was done.
I did something I have never done before.My paper clay is still drying.

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#62161 Which Wheel For My Student?

Posted by Marcia Selsor on 10 July 2014 - 09:24 AM

I, too, am vertically challenged at 5'2". I throw on a Bailey.
I think she needs to go to a showroom as suggested by Neil. Nothing like trying it on for size and comfort.
Could be short torso, short legs, people vary.

#61689 What Is Your Throwing Position?

Posted by Marcia Selsor on 02 July 2014 - 06:11 PM

Got my new stools finished. Here they are. I plan to enjoy good posture using the seat in the slanted position.It replaces an old chair. And it takes a smaller footprint.I am getting an urge to repaint my wedging table...but it will pass.

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#61645 What Is Your Throwing Position?

Posted by Marcia Selsor on 01 July 2014 - 08:08 PM

I will get Chris in this discussion when I show my color pallet for my 2 new benches.Got some oil cloth in a hardware store in Florence.Matched it with some paint from Home Depot. Our bodies are an important part of the creative process in clay. Some of you may be young now, but time marches on. I had bilateral carpal tunnel surgery when my wrists reached the point I couldn't lift a glass of water. I think it was due to lifting 1600 pounds of hard bricks in 2 kiln doors 4 x's week. I built hinged doors and a car kiln asap when we moved to a new building. Take care of your body. For those who think they can work without planning this aspect of the trade, think again. Whether you buy a $200 stool or use a crate with a slant from a 2x4, do it for your future.
It takes a long time to become a respected master potter. Take care of your body so you'll get there in one piece.Great discussion.