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How Much Bentonite / Vee Gum T On Singlefire Glazes?


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#1 enbarro

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Posted 13 February 2014 - 09:30 PM

Hi, I mostly singlefire to cone 04-03 and brush my glazes on bone dry pots.

I ordered vee gum t and have bentonite.  I’ve read I should add no more than 3% bentonite somewhere and somewhere else to add  5% of bentonite when single firing.

Can someone with direct experience on the matter help me out?

I know I need to try this on my own, with all the variables I work with… still I might save quite a bit of time with some help.

 

Thanks.



#2 Marcia Selsor

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Posted 13 February 2014 - 10:14 PM

5% for single fired glazes on ^ 6 single fire . I don't know about low foe.

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#3 enbarro

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Posted 15 February 2014 - 11:15 PM

Thanks! So, 5% no matter the glaze composition? Was getting the Veegum T a waste of money?

 

Any help related to Veegum T for brushing glazes, even if not single fire is still welcome. I've never tried it before. Is it stronger or weaker than Bentonite?



#4 neilestrick

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Posted 16 February 2014 - 08:22 AM

I prefer VGT to bentonite for brushing glazes. 2-3% in combination with gum solution makes a nice brushing formula. Make gum solution by adding 2 tablespoons CMC Gum and 1/2 teaspooncopper carb (preservative) to a gallon of hot water. Let sit overnight then blend well. Use the gum solution in place of 1/3 of the water in the glaze.
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#5 enbarro

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Posted 18 February 2014 - 10:21 PM

Thanks Neil! 

I received the veegum t today... I think I’ll start with 3% veegum without cmc. I’ve never been able to make the cmc work… What do you think it adds to the mix?



#6 neilestrick

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Posted 18 February 2014 - 10:29 PM

The CMC is what will really make it brush well. It allows the glaze to hold more water so it flows onto the pot better and doesn't dry immediately when the brush hits the pot. Also adds a bit of sliminess for flow. You will have to experiment with how much gum solution you like in your glazes.

 

Let your wet glaze sit overnight and blend/blunge well to incorporate the VeeGum T.


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#7 enbarro

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Posted 18 February 2014 - 10:58 PM

Thanks. I'll give it a try.






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