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Red Rocks

Member Since 24 Mar 2012
Offline Last Active Feb 17 2014 10:23 PM
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Posts I've Made

In Topic: Super-Old Glaze: Hardpanned?

24 August 2013 - 10:32 PM

Old Lady:

 

A good question but it was not a new batch of chemicals.  I actually glazed 4 or 5 pieces with the new 20,000 gram bucket and they came out perfect.  I went back to glazing several days later and the glaze was hard-panned.  That is when I added the bentonite and epsom salts.

 

Next firing in a month or so, I will pour out half of the bucket into a a separate bucket and add the Mason Stain #6600 and see how it turns out. 


In Topic: Super-Old Glaze: Hardpanned?

20 August 2013 - 11:17 AM

Couldn't agree more about the low iron and lack of colbalt.  However as I am learning to work with a new kiln, I first mixed a 5000 gram batch and it came out a wonderful blue green, then a 10,000 gram batch, again the beautiful blue green I expected.  So not sure what causes the blue, just know that it is.  It was when I went to the very large bucket and 20,000 grams plus that it did the hard pan number.  I actually glazed a few pieces that came out blue green from the large batch, then I made the mistake of putting the additonal bentonite and the Epsom salts in the already mixed batch and that is when it turned light green.

 

I think Tom Coleman's idea makes sense as Mason Stain #6600 is a strong black stain and a little should go a long ways.  I will experiment with it before trying to change the 20,000 gram bucket.


In Topic: Super-Old Glaze: Hardpanned?

19 August 2013 - 09:44 PM

Quick update.  I did contact Tom Coleman and he responded very quickly.  He said he thought that the Bentonite did indeed effect the glaze and said I should add 25 grams of Mason Stain #6600 to bring it back to blue green.

 

He also said he no longer uses Bentonite or Epsom salts to keep a glaze in suspension.  He uses a small amount of muriatic acid like one tablespoon for 20,000 grams.  Says it works great. 

 

I will try both of these over the next month or so and post and update.


In Topic: Using Old Ceramic Fiber Blanket

16 August 2013 - 01:39 PM

Thanks for all your comments on this.  I am back in Red Rock country after two weeks on the coast.  Over the next month, I will tackle this and report back on the process and the results.


In Topic: Which Artist Would You Love To Work Beside In Their Studio For One Week? Wh...

11 August 2013 - 12:10 PM

I am with Mark - I would choose to work at Hamada's back in the day.  The other potter would without a doubt be Marguerite Wildenhain and a week at Pond Farm.