Showing posts with label Cone 6. Show all posts
Showing posts with label Cone 6. Show all posts

Sunday, May 12, 2019

Building Community

I had a date on Friday, with my community! I gave my students at Hallowell Clay Works an assignment, to make a serving dish perfect for a specific food, then make that food & bring it to our studio-wide potluck. I of course also brought a dish, in a dish; I made a tomato & cucumber salad. We expanded the invitation to the whole studio, so we could meet the people who make the beautiful things we're been seeing on their shelves.

Most of the time I write about being a studio potter, but I am also a ceramic educator. I've successfully built or had a hand in building ceramics programs at three or four institutions now; in a couple of cases the programs doubled in size during my tenure (not all down to me, of course, but I did my part.) I find that the key is community. Clay has a really steep learning curve! It's easy for students to get frustrated and give up when the beautiful items they dream of making remain out of reach for months and months. What keeps people coming back, to pay money to be frustrated over and over again? Community.

Friends. Encouragement. People to tell your stories to. People to commiserate with when things don't go well, and to cheer for and with you when they do. I have come to realize that my main contribution as a ceramic educator is not merely to teach people how to make stuff, but to knit together communities of supportive friends.

Almost 20 years ago, Robert Putnam wrote a book called Bowling Alone: The Collapse and Revival of American Community. In it, Putnam describes the decline of social capital in the late 20th century, with decreasing participation in activities and groups that pull people outside of their existing in-groups. 
Bowling Alone was written prior to the existence of social media, but I tend to think, despite its name, that social media has the effect of dividing us further rather than bonding us. People we don't interact with in mundane ways can be reduce to one point of view we disagree with. Thus we grow ever more isolated in smaller and more limited circles.

So what, tho, right? The answer: 
But does it really matter that social capital is declining? Putnam argues that, indeed, it does, as social capital "has many features that help people translate aspirations into realities." (p 288) Putnam identifies five such features. First, social capital makes collective problems easier to resolve, as there is less opposition between parties. This results in improved social environments, such as safer and more productive neighborhoods. Second, it makes business transactions easier, since when people trust each other, there is less of a need to spend time and money enforcing contracts. As a result, economic prosperity increases generally. Third, social capital widens our awareness of our mutual connectivity. This can improve the quality of our civic and democratic institutions. Fourth, it helps to increase and speed up the flow of information, which, in turn, improves education and economic production. Finally, social capital improves our health and happiness through both psychological and biological processes which require human contact.
In particular, in 2019, we are politically polarized as we've never been before. We need places where we can come together and see the whole person, not just their ideology. Places where we can experience our commonality.  We need community.

Art is positioned to serve that function! In fact it happens naturally, but I've learned in my role as instructor that I can foster and nurture the bonds that create community.

That's what Friday night was. A bunch of fun people, great food, and the salvation of our society.

Or something.


Saturday, December 1, 2018

Apple Green Conversion

It's been a couple of years since I expanded my glaze palette. Mixing glazes is not my favorite thing to do (if it's yours, please let me know! 😄 You might be utterly unique.) The glaze kitchen tends to get cluttered up with bikes and gardening equipment, so I have to clear it out before I even begin. Every firing seems to be pushed against a time limit (and whose fault is that?) so adding an additional task - mixing a test glaze - isn't feasible. But! I am starting to get antsy for new colors & surfaces. The green in currently have I rarely use - it's a little dark for the candy-coated vibe of my ware. This, though: this promises apple green! That would be right up my alley.

It's not currently chemically quite right for soda; and I will want to do a ^6 conversion on it also, to have both possibilities. I am doing a lot less ^6 these days - I find the soda glass itself is just not quite as luscious, somehow, so I've been unwilling to quit ^10 entirely. Keeping two sets of glazes and two sets of claybodies is actually something of a strain on the space limitations of my studio, in addition to the ever-present risk of getting a piece or a glaze in the wrong firing, with results either disappointing or disastrous, depending on which way it goes. Right now I fire to ^6 for a couple of orders, both of which have more glazed ares and less bare clay or flashing slip. It works well for these,but one of the questions I need to answer in the new year is whether it's worth the storage space & the risks.

I look forward to the Week of Reflection to decide this and other questions.

The easier conversion, obviously, is the one to make this glaze (hopefully!) appropriate for soda firing. It has the necessary percentage of whiting, so I would only need to replace some of the silica with boron. There's a goodly amount of silica in this recipe, too: 28%. I am thinking to switch out 3% of it with boron and run it up the flagpole. ETA: NOPE

Which is to say, run it through the glaze calculation software & see what  it turns up.

Here's the recipe as-is, which I got from Claybucket

COLEMAN APPLE GREEN CELADON*
Coleman Apple Green
Cone: 9 – 10
Color: transparent green
Surface: glossy
Firing: reduction
Recipe:    (percent)
Whiting …………… 17.95
Custer Feldspar …. 43.59
EPK …………………. 10.26
Flint …………………. 28.20
Totals:        100 %
Also add:
Chrome Oxide ………  0.25
Red Iron Oxide ……… 0.77
Here's how it looks when Elaine Coleman uses it over porcelain:

Here's the recipe with the alteration I hope will adapt it for soda, with the changes highlighted:

Apple Green for soda
Cone: 9 – 10
Color: transparent green
Surface: glossy
Firing: reduction

Recipe:    (percent)
Whiting …………… 16
Gerstley Borate............1.95
Custer Feldspar …. 42.59
EPK …………………. 11.26
Flint …………………. 28.20

Totals:        100 %

Also add:
Chrome Oxide ………  0.25
Red Iron Oxide ……… 0.77

Now, this recipe also has a large percentage of potash feldspar (Custer Spar) at 43%. It's probably worth trying a 1-for-1 substitution of Custer for Neph Sy - that might be enough (again, GlazeMaster might have something to say about it.) If that doesn't do the trick itself, I'll have to remind myself which frits are best for these colorants and for soda.

The first mix is on my to-do list for today; I'll be testing it in my own kiln next week and in the Portland Pottery stoneware kiln as well, so I can see how it performs without the influence of soda.
Photos next week!
After all this, I decided it would be smart to mix it as-is first, because every now & then a glaze surprises me & does just fine in soda. 

*Why why why doesn't spellcheck know the word "celadon?" I mean "tenmoku" & "shino" I get but celadon is just the name of a color. 😕

Monday, June 3, 2013

Flashing Slip to Try

Found this while noodling around in a Pottery Basics Yahoo group.

#1997 Fake Avery Flashing slip opaque white to orange Cone 6 10

15 Newman red or Red Horse clay
84 EPK
1 Soda Ash

Wait, but...Newman Red is a fireclay. Red Horse is an earthenware. How are these interchangeable in this recipe?

Guess I'll have to mix them up and find out.

Sunday, April 21, 2013

So Confusing!

In my quest to translate my soda glaze palette to Cone 6, I've downloaded the Insight Glaze Calculation software. Why do things the hard way? Right now I've got the trial version but I can see how this software would pay for itself over time - assuming I can ever figure it out! That's my task today.

I get asked a lot why I don't just use glazes that are already on the web. Julia Galloway is one potter who has graciously shared her yummy recipes with the world, and there are certainly others. It's hard to explain, but it's important to me to increase the sum of glaze recipes available to potters who would like to go the ^6 route. We can't all just utilize the recipes of a few. I see nothing wrong with using others' recipes - I do it all the time, and make my recipes available as well - but I also want to contribute to the sum of resources out there. Not everyone has that option, but I do. 

So: Insight! I thought I could just sit down and start entering recipes, but looking at this screen, that's not gonna work. Fortunately Insight comes with an instruction manual. A 139-page instruction manual.

When all else fails, read the directions.

EDIT: Lucky me. DigitalFire has a whole section of video tutorials! Gonna check those out first.

Sunday, January 13, 2013

Four VC Glazes

I spend my evenings now paging through the Cushing Handbook, looking for ^6 glazes that might perform well in soda, for the upcoming test firing. None of them are specifically meant for soda, but I'm looking for things that meet the criteria offered by June Perry in her very helpful comment here. I'm also trying to stay away from barium.

I've found a few that fit, or will, with some minimal alterations:

VC Transparent Glossy 3 (Gonna have to give that - or its descendant, if I alter it, a more succinct name!)

Custer Spar       40.0%
Gerstley Borate 18.0%
Whiting              16.0%
EPK                   10.0%
Flint                    16.0%

This sounds like a good base glaze. I'd like to get a good chartreuse or spring green without barium. 

VC 71 Base
Neph Sy           24.0%
Frit 3124             9.0%
Whiting              16.0%
Talc                     9.0%
EPK                   10.0%
Flint                    16.0%

Just listen to the description:  "Wonderful surface. Really sensuous smooth matt. Has a kind of glow like looking at a pearl. All the colors keep this same character; a gorgeous base glaze.- V.C." I don't just want to mix this glaze; I want to sleep with this glaze! Sadly, it's characterized as an oxidation glaze but it can't hurt to try it is reduction.   

VC 72 Base
Neph Sy            24.0%
Dolomite            11.0
Gerstley Borate  12.0
Whiting                4.0%
Zinc Oxide           2.0%
EPK                     7.0
Flint                    40.0

This one is described as a little more glossy but with a glow; Colors break with some texture.

And, finally:
VC Easy Gloss 1
Gerstley Borate 50.0%
EPK                  50.0%

I have no particular reason to believe that this glaze will perform well in soda, but I am a sucker for a 2-ingredient glaze. It seems worth it to test it, on the off chance that it will work  and I'll forever more have a recipe that is a joy to mix.

Of course, I am still without a scale, because the one I recently ordered bought the farm after only one use. I contacted the Big Ceramic Store, who, bless their hearts, offered to credit me towards any other scale, or refund my money. That particular model - 7001DX - has been discontinued. It seems I didn't just get a lemon, they are all defective. Despite the bum scale, I am pleased with how the Big Ceramic Store handled it: they got back to me right away, and were as helpful as could be under the circumstances.

Anyway: it's amazing how quickly I got spoiled. Mixing with the digital scale was so much faster and easier than using the triple beam that I never want to go back. I did repair the triple beam (more or less) for using in my soaping hobby, so technically I could just bring it back for studio use, but I think I'll wait.



Friday, January 11, 2013

Cone 6 Test Recipes

Blair’s Red Variation
Flashing slip: apply to leather hard on the dry side

Neph sy 15
Grolleg 20
Helmer kaolin 65


Add 5 Neph Sy
This is a slightly altered version of Mark Knott's red flashing slip; I've increased to Neph sy a little


Water Blue cone 6 (Julia Galloway)

Gerstley borate 6
EPK 7
Frit 3110 77

Flint 10
Bentonite 3
Add
Copper carb 1 – 5% (I used 3%)
Cobalt carb .5% - 1%(I used .5%)
Or try stains in the 2 – 5%


Smooth Orange Flashing Slip
Apply to leather hard
  
EPK 40 
OM4 ball clay 40
Borax 5
Zircopax 10
Neph sy 5


This is also a Mark Knott recipe. 

These are sort of the low-hanging fruit: recipes that are available online, that people who already fire Cone 6 soda are using.I admire both Julia's and Mark's work, and plan to incorporate some of their glazes (or variations thereof;) however it occurs to me that to keep the ^6 soda palette from getting too inbred - all of us using the same recipes - I am going to have to reach beyond the published glazes, and create some of my own. Hopefully I can tweak glazes I am already using at ^10, as I like my glazes and would hate to have to simply retire the whole palette. Also, I really need a flashing slip that I can apply to bisque; maybe replace the EPK in the Smooth Orange with calcined kaolin?

Wednesday, January 9, 2013

It's a Fine Day to Mix Glaze

That's not a thing that you'll hear me say too often, but circumstances have conspired to make this the perfect glaze-test mixing day:
  1. I have my new digital scale to test out!  It's a 7001DX, which I got at bigceramicsstore.com; it was only about $50 with the shipping. (If you click the link it's about 3/4s of the way down the page.) Since it has a 7000 gm capacity, I think it will speed up my glaze mixing considerably, and offer fewer opportunities to screw up a whole bucket of glaze without even realizing it until I unload a kiln full of ruined pots. Not that that has ever happened to me, but it seemed like only a matter of time, when I had to weigh out ingredients in several increments.
  2. Val Cushing's  handbook arrived in the mail today; you would not believe the wealth of information in this spiral-bound volume. I'm so excited to read through it I can hardly sit still! Professor Cushing offers this book for $28, which includes shipping; you can get your copy by sending a note and a check to:

    1497 Water Wells Rd.,
    RD 1, Box 236 Alfred Station NY 14802,
    607 587 9193


    And - icing on the cake - Professor Cushing signed my copy! He says he likes the name Fine Mess Pottery. :) The book is also available at Amazon, if you prefer to shop electronically.
  3. I have a test firing coming up with Liz Proffety, a mid-coast potter I met through a Watershed event. Liz fires ^6, I fire with soda: together we are like chocolate and peanut butter. Two great tastes that taste great together: Cone 6 soda! I plan to use the Cushing handbook to re-formulate some of my glazes to see if firing to a lower temperature will work for me. As always, I will share my results here. 
Look at the time! At my latitude, daylight hours pass quickly this time of year, and it's well to make the best of them.