Slip Casting

 

 

  • Introduction

    Slip cast porcelain sake cup

    Slip Casting Southern Ice Porcelain

    Peter slip casts Southern Ice porcelain using a variety of techniques including 3D modelling to create the source forms and rapid prototyping technologies to render the 3D models prior to slip casting.

    The cup 'Cone' above and the cup 'Orbit' on the left of the three cups were created using 3D modelling and rapid prototyping. See also Hybrid Flasks and Porcelain Sake Set

    The American website accessceramics.org features the work of over 400 international ceramic artists who are invited to upload images of their work on an ongoing basis. Work created using a particular technique may be found using the menu: browse > technique. View the slip cast ceramics on accessceramics website.

    Peter Biddulph Three slip cast porcelain cups
    Slip Cast Southern Ice Porcelain Cups | See also the Southern Ice porcelain page

  • Equipment

    Buckets One for mixing plaster, a second containing water for washup - plaster discarded in sink will block it.
    Washing up bowl To act as a type of cottle to contain the object to be cast and prevent the plaster from running out
    Plastic jugs for pouring casting slip into moulds
    Fitted mask with filters A paper mask will not suffice when mixing fine dry ingredients such as plaster. Use a fitted mask with filters such as a Unisafe RP462 mask. You will need two Class P2 filters for the mask. The mask is available in small/medium and large.
    Plastic sheeting protects surfaces from plaster
    Suitable objects for casting start with symmetrical objects for 2-piece moulds
    Permanent board marker to mark edges of object prior to casting in plaster
    Wooden modelling tool to achieve a neat edge where clay meets object prior to casting in plaster
    Small sponge for tidying rims and 'seams'
    Trimming knife for refining shape

  • Materials

    Potter's Plaster available from Borals
    Paper pulp to add to wet plaster
    Practice clay for isolating parts of object prior to casting in plaster
    Soft soap to act as mould release
    Walker's 10 casting slip may be purchased or mixed using Walker's 10 powdered clay
    Deflocculants: Sodium Silicate, Dispex and Soda Ash enable fluidity of casting slip with minimal amount of water
    Talcum powder small amount rubbed on plaster mould facilitates release of slip cast object