Slips, Engobes and Terra Sigillatas - Alfred's Clay Store

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Comparing bodies to slipsV.C. HF 4 All purpose white base slipCone 9-12Grolleg30EPK15XX Sagger25• Kaolin• Kaolin• Ball ClayNepheline Syenite 15 • Soda SparFlint 10Wet to leather hard application70% ClayV.C. Off White Throwing PorcelainCone 9-10Tile #630• KaolinEPK15• KaolinC&C15• Ball ClayKona F-4 20 • Soda sparFlintPyrax1010Macaloid +160% Clay•Moresimilaritiesthandifferencesbetween thetwo• Could we usea slip as aclay?
Wet vs. Bisque• Wet application slips– High clay = creamy quality perfect for painterlyqualities– Wet clay and slip can be carved as one (sgraffito)– Ideal for slip trailing/thick, textural layering• Bisque application slips– Timing is irrelevant (ware can be slipped at leisure)– Application can be washed off and reapplied– Can be applied over glazed ware– Work undergoes distortion from drying and firingbefore slip is applied (great for precise work)
Page 1 and 2: Slips,Engobesand TerraSigillatasLec
Page 3 and 4: Glazing over slips• Great way to
Page 5 and 6: Formulating slips• A slip can be
Page 7 and 8: Clays• Chosen for their relative
Page 9 and 10: Hi Soda3110Hi Calcium/Boron3124Hi C
Page 11 and 12: Hardeners• Used to improve hardne
Page 13 and 14: Colorants• Can be added as either
Page 15: Slip compositions• Note changes i
Page 19 and 20: The shrinkage myth• Many bisque-a
Page 21 and 22: Terra Sigillata• Dense, silky-smo
Page 23 and 24: • Ball mill ingredientsand place
Page 25 and 26: Like GeologyMaking a Terra Sigillat
Page 27 and 28: Drawbacks to Terra Sigillata• Gla
Page 29 and 30: • Extreme thickness change from t
Page 31: Multiple firings,then cut on abrick
Page 35 and 36: SpackleExampleCone 04Raw Claw10Calc
Page 37 and 38: Vitreous vs. Non-VitreousV.C. 5 vit
Page 39 and 40: Robert SperrySteve Heinemann
Page 41 and 42: Solutions to cracking in dryingstag
Page 43 and 44: Cracking due to trapped air• Slip
Page 45 and 46: Cracking after firing• Can also b
Page 47: Shivering!
Page 50 and 51: Using a pintool as athicknessgaugeT

Slips, Engobes and Terra Sigillatas - Alfred's Clay Store

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