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S. Dean

Member Since 18 Jun 2013
Offline Last Active Today, 06:23 AM
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Posts I've Made

In Topic: Source For Brown Raku Clay

19 July 2014 - 05:01 AM

Jayne,

 

Since you are using Highwater Clays, you might want to give Riverside Grit a try.  Groggy sculptural clay, 9% shrinkage and it holds up well outdoors.  Fires to a tan color at cone 6. 

 

-SD


In Topic: Image Envy ...

18 July 2014 - 07:39 PM

 

 This resonates with me big time. At a show, a woman grabbed a colorful bowl I made. Looking suspicious, she asked why the price was so low. I said nothing. To my relief she bought it and thankfully carried it away, out of my sight. For you see, I despised it.

 

 

Funny how the one's we dislike the most are often the first one's to leave the sale booth.


In Topic: Anyone Else Interested Or Know Anything About Firing Leopard Spot Shinos?

16 July 2014 - 04:35 AM

 


So, my thoughts are, a pot wrapped in styrofoam peanuts will have areas where the styrofoam is in direct contact with the pot ("contacted areas") and other "open areas" where the styrofoam doesn't actually touch the pot's surface. As the wash or glaze dries, soda ash evaporates/migrates to pot's surface in the "open areas", but no evaporation or surface migration of soda ash occurs in the "contacted areas" (i.e., where the styrofoam touches its acting like wax resist).  Carbon trapping will occur in the open areas where there is soda ash present.  Conversely, no carbon trapping happens in the "contact areas" because there is no evaporated soda ash on the pot's surface at these touch points. 

 

-SD

 Yes but the wax resist (I have done this, rubber bands are good for straight lines :)  ) makes the soda migrate to the sides.  You don't get carbon trap where the wax is (we get pretty good orange usually with a malcom davis).

 

 I think maybe the popcorn actually sucks moisture out where it is located (maybe sponges would work too). Thus causeing the opposite effect. More carbon trap in the spots that are touching.

 

 I'll have to try this out soon, am curious now.

 

 

Rebel_Rocker, I don't think that carbon trapping ia happening where the styrofoam peanuts touch the pot,  Marcia asked earlier in this topic "Why would there be non-carbon trapped dots where the pot was touching the [styrofoam] popcorn surface." (emphasis added).  This is consistent with the styrofoam acting like a resist and soda ash migrating to the surface of the pot that isn't any styrofoam in direct contact..  Moisture doesn't wick through a styrofoam cup, so I don't think glaze is being sucked up by the styrofoam peanuts.  

 

Now you could be onto something with the sponge.  If you try this, please let us know what you observe.

 

-SD


In Topic: Mixing Black Clay Body - Cone 10 - Need Expertise

13 July 2014 - 10:35 AM

John,

 

I agree that we don't necessary know the context of how the information was shared.  Thanks for clarifying the causal component.  

 

-SD 


In Topic: Mixing Black Clay Body - Cone 10 - Need Expertise

13 July 2014 - 10:05 AM

Possibly this instructor considers this his own R and D like the Mudslinger discussion about paper clay not shared in a common studio. I can't see a good teacher doing this misleading on purpose unless they really don't want to share the recipe.May be time to move on.
Marcia

 

That's always a valid position for the instructor to take, but in a instructor/student relationship, it is only fair/right for the instructor to explain to the student that they are not willing to share.  In this relationship/setting, for the instructor to deliberately share incomplete information without disclosure just strikes me as wrong.