[claclana]

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!

[bciskepottery]

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.

http://www.youtube.c...player_embedded

[Marcia Selsor]

bciskepottery, on 04 December 2012 - 08:40 PM, said:

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.

http://www.youtube.c...player_embedded

great video!
Marcia

[neilestrick]

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.

[Wahine]

This is a great video. Should explain what you need to do. - chantay


http://www.youtube.c...h?v=3an-E0Lk8mQ

[claclana]

GREAT!

I have the needed answer
Thanks!