John Britt flocculation/deflocculation demo

John Britt demos slip flocculation/deflocculation via acid/base addition at the , Cone 6 crystalline workshop, March 2017, Richland College.

[@nandanmendapara8604]

very good explaination sir..

[@micheledickey4066]

What causes the marveling? My slip is staying marbled no matter how long I mix it. Anyone know what I can do? I’m using it for casting slip.

[@andrettapottery1924]

Hi. I tried sodium silicate in my china clay slip but it made it thicker rather than thin.. any explanation?

[@firstenforemost]

You added too much.

[@____Ann____]

If you add too much it thickens. You only need a few drops of sodium silicate.

[@dusiekxx3]

I added as much as always and it thickened also. I add only liquid glass to my slips and there was never a problem, after a year and a half of work with it, it started getting thicker. What am I doing wrong?

[@forevercreating-yg4id]

How are you John? How do you fix over deflocculated slip? Thank you

[@Arhmt9Playlist]

Add Epsom salt dissolved in warm water. He does this in the video.

[@lasigonbig7811]

Hello is it necessary to add sodium silicate and what is its role?

[@firstenforemost]

It's a deflocculant. It makes the particles of clay separate and flow more liquidly without adding water.

[@andrettapottery1924]

Also that white stuff ... I couldn't hear the same

[@artantme]

sounded like "nephsite", which could be nepheline syenite

[@____Ann____]

Neph sye = nepheline syenite

[@micheledickey4066]

I really wish he would have said what he was putting in instead of saying as this.

[@jerrywhidby.]

Sodium silicate AKA water glass was added to the clay to deflocculate (thin) it. Epson salt was mixed with water, and used to flocculate (thicken) the clay.