claclana Posted December 5, 2012 Report Share Posted December 5, 2012 Hello I want to be able to make spikes as large as possible by squeezing them with slip (I suppose dense could be nice). I would like to do the slip from the clay (cone 04) I am using, I have darvan 811 and sodium Silicate (to reduce water content-shrinkage/crackings) but I don't know what quantity should I use, the formulas I find are for too big batches. Is there some possibility to do about 2 pounds of slip? THANKS! Link to comment Share on other sites More sharing options...
bciskepottery Posted December 5, 2012 Report Share Posted December 5, 2012 Darvan will make the slip more fluid; you might want to use epson salt. Here's a good video that shows effects of using Darvan and epson salt. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted December 5, 2012 Report Share Posted December 5, 2012 Darvan will make the slip more fluid; you might want to use epson salt. Here's a good video that shows effects of using Darvan and epson salt. great video! Marcia Link to comment Share on other sites More sharing options...
neilestrick Posted December 5, 2012 Report Share Posted December 5, 2012 Deflocculating with Darvan or sodium silicate will allow you to take a VERY thick slip with low water content and make it fluid enough to work with, therefore minimizing shrinkage. Flocculating with epsom salts will take a slip with a higher water content and higher shrinkage rate and make it thicker, but will not do anything to reduce shrinkage. I would take a very thick, sludgy, non-fluid slip, like almost thick enough to form into a shape, and deflocculate it by eye. Mix equal parts water and deflocculant and and add it a couple drops at a time to your sludge until you get the viscosity you need. Link to comment Share on other sites More sharing options...
Chantay Posted December 5, 2012 Report Share Posted December 5, 2012 This is a great video. Should explain what you need to do. - chantay Link to comment Share on other sites More sharing options...
claclana Posted December 6, 2012 Author Report Share Posted December 6, 2012 GREAT! I have the needed answer Thanks! Link to comment Share on other sites More sharing options...
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