K DeBord Posted November 23, 2020 Report Share Posted November 23, 2020 I am switching from SS and soda ash to Darvan 811 in my white (talc body) casting slip. I make a batch with 50 lbs. Tenn. ball clay, 50 lbs. Kent. ball clay, 50 lbs. PV clay and 150 lbs. of talc, and about 17 gallons water. How much Darvan 811 do I need and do I dilute it? Link to comment Share on other sites More sharing options...
Min Posted November 24, 2020 Report Share Posted November 24, 2020 If this is an open lowfire slip Darvan 811 might not be the best choice, from Vanderbilt Minerals: "DARVAN 811 is used in vitreous and semivitreous bodies, and in glazes. A slip deflocculated with DARVAN 811 provides the following advantages over the conventional soda-ash, sodium silicate system used to disperse ceramic bodies" Darvan 7 might be a better choice. Link to comment Share on other sites More sharing options...
K DeBord Posted November 28, 2020 Author Report Share Posted November 28, 2020 On 11/23/2020 at 4:37 PM, Min said: If this is an open lowfire slip Darvan 811 might not be the best choice, from Vanderbilt Minerals: "DARVAN 811 is used in vitreous and semivitreous bodies, and in glazes. A slip deflocculated with DARVAN 811 provides the following advantages over the conventional soda-ash, sodium silicate system used to disperse ceramic bodies" Darvan 7 might be a better choice. Link to comment Share on other sites More sharing options...
K DeBord Posted November 28, 2020 Author Report Share Posted November 28, 2020 Thank you. I'll look into it. Link to comment Share on other sites More sharing options...
Mark C. Posted November 28, 2020 Report Share Posted November 28, 2020 Darvon 7 for slip casting is what we always used-that was cone 10 slip casting porcealin body Link to comment Share on other sites More sharing options...
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