JJ Bedore

I have made casting slip from reclaim clay. A couple of questions: the texture of my casting slip is heavy whipped cream. The specific gravity is 168. I'm not sure how to get the viscosity to "cream state" so I can pour it while increasing the specific gravity to between 170-180. Do I need a deflocculent (I have Darvan)? Or does reclaim clay have enough Darvan already in it that I shouldn't add more? Do I even need to measure Specific Gravity with reclaim clay? I used a little Darvan on a test batch (not my whole bucket) and poured it into a cup mold but it took hours to dry and was very thin. I'm missing something here. Thank you for any help you can provide.