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Marcia Selsor

Member Since 16 May 2010
Offline Last Active Today, 01:36 PM

#127288 Spray Glazing Vs Dipping

Posted by Marcia Selsor on Today, 01:11 PM

If you are spraying over the overglaze, a starting point for thickness would be when you no longer see any color from those underglazes. But it is tricky. Other "rule of thumb" would be 1/32" measuring with a pin tool. Spraying a glaze on builds up in layers...fluffy layers unless you put it on too wet and it runs. then it is no longer fluffy and the 1/32" measure doesn't work.


Stephen Hill has been teaching layering effects from spraying for electric kiln ^6 firings. You may give him a look.


Dipping is quicker, but you may not get what to want with those underglazes. It depends on how well you handle dipping.




#127233 Pots in Movies

Posted by Marcia Selsor on 25 May 2017 - 09:00 PM

Anyone watching Frankie and Grace? Great pots in their homes!

#127185 Opening Peep Hole With Vent On...

Posted by Marcia Selsor on 24 May 2017 - 07:33 PM

Me, too.

It is always something to learn with clay.


#127153 Opening Peep Hole With Vent On...

Posted by Marcia Selsor on 24 May 2017 - 08:30 AM

Grey Bird, I have been there with explosive kiln loads that looked horribly like the one I'm looking at in the photos and I have to tell you ONE GOOD THING about making a mistake like this: once you figure out where you went wrong, you will know how to keep it from happening again. :) 

I definitely agree that this is caused by moisture (Neil and Marcia have probably one hundred times the experience I do but just to put in my two cents' worth ...) Before you fire, the pieces should feel dry and not cold to the touch. If they are cool or cold even if they appear dry, there is still moisture in them and as Neil said, it's steam that is the killer, not air bubbles, (unless the air bubbles also contain moisture). I know experienced potters who sometimes choose to "candle" their wet work (fire wet work for a long time at a low temp to quickly dry it) but in my opinion it increases the risk to the work so much that it is not really worth doing.

When I was in school, the directions were to lick or spit on the bottom. If the wet spot disappeared quickly it was dry. Cold or cool is a little more sanitary. It is a hard lesson to learn. For larger or thicker pieces, I dry them raised on sticks to let the bottoms dry. By larger I means Bird bath columns or pillars or larger hand built work. I fire my large oak slabs (24") on edge and preheat for 8 hours.

#127134 Opening Peep Hole With Vent On...

Posted by Marcia Selsor on 23 May 2017 - 07:28 PM

It appears that some pieces were very thick judging by the wall thickness in some of the shards, that could be the problem. If any one of those blew with a force, it could blow up a lot of work.

#127106 Qotw: What Movie Best Describes Your Adventures In Clay: And Why?

Posted by Marcia Selsor on 23 May 2017 - 02:51 AM

because the duration of my life in clay is going on epoch. Many historical changes throughout the 50+ years but continue forward.

#127031 Filling The Kiln With Tiles

Posted by Marcia Selsor on 21 May 2017 - 09:39 PM

Agree with Nerd. BUT stacking technique is very cool
I may go for this next week as I prepare for demo firing at Gallery.

#127011 Another Ridiculously Simple Handbuilding/extrucer Question

Posted by Marcia Selsor on 21 May 2017 - 01:48 PM

I cut off segments as they come out of the extruder using a cutoff wire.
They when it is leather hard, I use a sur-form to shave it.

#126978 Lesson #541

Posted by Marcia Selsor on 20 May 2017 - 06:22 PM

I have re-fired a few things, sometimes to fix where a glaze didn't work or pinholes. I use a dry paste of the glaze or powder.

#126953 What My Flutes Sound Like

Posted by Marcia Selsor on 19 May 2017 - 09:32 PM

I have some ceramic flutes from Spain that I bought many years ago. Yours sound much better.

#126869 Iron Oxide Slip

Posted by Marcia Selsor on 18 May 2017 - 05:51 AM

That seems to be an extremely high percentage of iron. Where did you get that recipe? I think you should lower the percentage to 10% or less and add a small amount of flux to your slurry.

#126860 Qotw: What Do You Listen To While Working In The Studio? Music, Tv, Talk Radi...

Posted by Marcia Selsor on 17 May 2017 - 08:33 PM

I agree, Nerd. Working next door to the sculpture studio where they were cutting things on top of metal garbage cans and I'd go home with ringing in my ears from the noise, I really love silence with a natural backdrop of birds. Heard Sand Hill cranes singing to each other in a rather romantic mating call the other morning. Beautiful. And I live in town where it is still quiet.

#126810 Looking For A Used Spray Booth

Posted by Marcia Selsor on 16 May 2017 - 05:07 PM

The post following yours in this section on equipment, has the link to home made equipment including a spray both and a trap. Scroll down to see the individual tools.http://potterre.over...le-2058307.html


#126758 Sake Set

Posted by Marcia Selsor on 16 May 2017 - 07:10 AM

sake cups are small. 2" x 2" finished.



#126677 How Clay Has Shaped You?

Posted by Marcia Selsor on 14 May 2017 - 10:58 AM


you said:You could say that clay taught me to appreciate the individual aspects of a person. The appreciation of flaws in nature, people and life.
I agree with you 100%. When I wrote recommendations for students taking ceramics as an elective I started out saying "Although I am merely a pottery teacher, this class allows me to know and understand the character of each student in how they deal with the complexities of clay." It shows their perseverance, character, and work ethic. I could write some pretty strong recommendations for these kids whether they were applying for teaching jobs, medical services or social services. I think Clay does open your eyes to others and their character.