Andre Johann Strydom
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Andre Johann Strydom's Discussions

Thank you Norm Stuart. Save the Darvan gel-like reclaim for wheelwork!

Started this discussion. Last reply by Norm Stuart Mar 14, 2020. 1 Reply

Hi,It has been awhile, but I have been very busy reacting to the advice given with great success, . This was exactly what I needed to do Norm. The clay restoration from slip to wheelwork experiment…Continue

Darvan/dispersant & slip ..is that the need 4 non-Newtonian thixotropic character reversel in wheelwork.

Started this discussion. Last reply by Norm Stuart Aug 13, 2019. 1 Reply

We have a lot of recycled white slip waste offcuts which I have tried to get to a point through the pugmill to be able to do wheelwork .I have experimented with added Grogs and Kaolin.The big problem…Continue

Tags: #shear, #bentonite, #positve, #reversal, #dispers

 

Andre Johann Strydom's Page

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Vanessa Herbert left a comment for Andre Johann Strydom
"Hello, How is everything with you, my name is Venessa Herbert, I picked interest in you after going through your short profile and demanding it be necessary to write to you immediately. I have something very important to disclose to you concerning…"
Aug 26
Norm Stuart replied to Andre Johann Strydom's discussion Thank you Norm Stuart. Save the Darvan gel-like reclaim for wheelwork!
"I'm glad.  You just need to experiment until it works right."
Mar 14, 2020
Andre Johann Strydom posted a discussion

Thank you Norm Stuart. Save the Darvan gel-like reclaim for wheelwork!

Hi,It has been awhile, but I have been very busy reacting to the advice given with great success, . This was exactly what I needed to do Norm. The clay restoration from slip to wheelwork experiment was done with 2x additions and I tested Bentonite Calcium 100# as well as Bentonite Calcium, "albeit at double the cost "..the. 300#.  There has been no noticeable difference between the 2 grades. I have thus decided to go with the cheaper 100# Bentonite.For a detailed recipe and technique go to the…See More
Feb 28, 2020
Andre Johann Strydom posted a status
"COMPLETED EXPERIMENTS AS PER: Darvan traps calcium and magnesium ions in clay and releases sodium ions in exchange. PERFECT RESULTS, thanks"
Feb 28, 2020
Norm Stuart replied to Andre Johann Strydom's discussion Darvan/dispersant & slip ..is that the need 4 non-Newtonian thixotropic character reversel in wheelwork.
"Darvan traps calcium and magnesium ions in clay and releases sodium ions in exchange To reverse this, you need to add calcium and or magnesium ions to exceed the Darvan level and flocculate the clay again. I use calcium chloride, used to melt ice.…"
Aug 13, 2019
Andre Johann Strydom posted a discussion

Darvan/dispersant & slip ..is that the need 4 non-Newtonian thixotropic character reversel in wheelwork.

We have a lot of recycled white slip waste offcuts which I have tried to get to a point through the pugmill to be able to do wheelwork .I have experimented with added Grogs and Kaolin.The big problem with the clay, which has been prepared for pouring ,firstly by adding Darvan/ dispersant. Makes a Great slip though! ...is that the non -Newtonian thixotropic character of this clay, because of earlier dispersant added creates a shear factor on the wheel which twists under pressure and is very…See More
Aug 13, 2019
Andre Johann Strydom is now a member of Electric Mid&Hi Fired Ceramics
Aug 5, 2019

Profile Information

What is your experience with ceramics in general. (Long answer encouraged)
Some after school 1968 and holiday week classes in local Hermannsburg German community in KWA ZULU NATAL, PROVINCE of South Africa.
1 year course at BAFA University of KZN.
Continued as hobby only till...
2015 I got retrenched from a 9 to 5 Management post for 30 years..
NOW... seriously making a living and wheel throwing or pouring to mould making...etc.
I only AAA cone 6 !
What is your current involvement with electric fired ceramics? (long answer encouraged)
I have 4 barrel kilns of various sizes. Large to very small barrel test kiln. Firing in Celsius BISQUE 1020*c with 30 minute dwell.
CLAY USED: commercial white ceramic premix/blend powder "TERRADURA" The name says it. FineClay. FIRING Range from 1020*c to 1040*c .
HAVE TAKEN IT TO 1200*C noted some shrinkage and slight buff colour.
All our content is viewable by the public. Why do you want to be a member, when you can already see everything as a non-member?
I NEED TO NETWORK WITH OTHER POTTERS.. WE ARE VERY ISOLATED HERE.
Where do you work on your ceramics projects?
home studio
Do you have your own, or participate in other ceramics Websites:
http://www.firstlight.co.za
How did you find this network?
search engine

Comment Wall (1 comment)

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At 11:44pm on August 26, 2024, Vanessa Herbert said…

Hello,

How is everything with you, my name is Venessa Herbert, I picked interest in you after going through your short profile and demanding it be necessary to write to you immediately. I have something very important to disclose to you concerning your surname that's to say your last name .since it's a public site.Could you please get back to me on: (

vanessaherbert1872@gmail.com

) for more details.

Regards.

Venessa.

 
 
 

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Tips for Members

If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014

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