Make Your Own Slip Casting Plaster Molds—Fast and Easy
Pick a ready-made design or upload your own custom pot profile. Buy a 3D print or print at home, then cast flawless plaster molds.

Why You'll Love Shape Cast

  • Stunning Results: Get high quality vessels and handles every time
  • Super Fast: From idea to printable molds in just minutes
  • Proven: Trusted by 1500+ artists worldwide
  • Effortless: No CAD needed, just upload your profile and select your options
  • Reusable: No silicone needed, the plaster molds can be used dozens of times

What Makes Shape Cast Molds Different

Shape Cast molds go straight from 3D print to plaster—no silicone, no coddle boards, no plaster guesswork. Say goodbye to plaster disasters.

Test your form ideas before ever touching plaster with printable proofs. Want to tweak it? Just adjust the 2D profile—new 3D models are generated automatically. Instead of taking weeks or months with traditional methods - Shape Cast allows you to easily and rapidly explore ideas and iterate on new designs.

When you have a form you love, masters only need a set of 3D prints. Shape Cast molds can be used for a limited edition, to expand your line-up, or to scale production. The same 3D print can handle dozens of plaster casts.

Designed for both beginners and pros—it just works.

Featured Predesigned Molds

See All Predesigned Molds:

Design Your Own Vessel Mold

Create a design of your very own! Create a custom one part plaster mold in three easy steps:

  • Upload your pot profile
  • Preview the form in 3D instantly
  • Download 3D models or order a 3D Print

What Our Customers Say

FAQs

What kinds of Custom Molds does the software support?

Shape Cast automatically creates molds for revolved, one-part forms.

What is a one part mold?

A one part mold is where to start with slip casting. There is one piece of plaster and no undercuts so the slip cast pot can easily be demolded

What about multi-part molds?

These are all custom designed and we can do the 3D modeling for you. Request a quote for more info.

Do I need a 3D printer? I don't have one!

No! You can order a 3D print from us if you're in the US. Many local maker spaces and libraries also have 3D printers, and there are online vendors who can print and ship anywhere in the world.

Which 3D printers work?

Any FDM printer will work. You can also print on a resin printer if you'd like. The molds are design to be very straightforward.

Do I need to use silicone?

No! Shape Cast molds go straight from 3D print to plaster.

How many plaster copies per 3D print?

Each 3D printed mold lasts for many plaster casts with proper care.

How do I assemble the molds?

Binder clips are used to assemble the molds. The molds have special ridges and grooves that mesh together to prevent plaster disasters.

Why metric units?

We use metric units because they are the standard for 3D printing. It also makes the plaster math easier which is a nice bonus.

Privacy

Shop

Buy ready-made molds for vessels and handles to pour your own plaster slip casting molds.

Studio

Create your custom one-part vessel designs. Shape Cast automatically generates 3D models with no CAD needed.

Vessels

Handles

Shape Cast vessel designs including cups and bowls. These can be used to make your own plaster molds for slip casting. Each form also has the original profile (an SVG) which you can download and edit to make your own design in the Studio.

Shape Cast handle molds are two part plaster molds (one for each half of the handle). Just like our other molds, you go straight from 3D print to plaster without silicone or other materials.

Details

  • The SVG file is the 2D profile used to generate the 3D files.
  • Once purchased, the download ZIP contains the 3D models ready for 3D printing.
  • The models contain an inner mold scaled up to account for clay shrinkage and with an attached slip well. The outer mold and ring complete the mold system and replace the need for cottle boards.
  • Use binder clips to assemble the 3D printed mold and pour plaster.
  • Included is a readme with volume information and calculations for the amount of dry plaster and water to use.
  • If any of the mold parts are too big for your printer, you can use the slicer to cut them in parts and then CA glue those together once printed. For example, if the form is too tall, cut it horizontally and do two prints. Or if it too wide, you can slice it vertically.
  • The included files assume a 13% clay shrinkage rate so your final sizes will vary based on your clay body.
  • If you want, use the SVG as is to change the clay shrinkage, or modify it to alter the form's profile. Upload it to Shape Cast to generate a new set of files.
  • Note: These molds have features that are very specific in size so the mold parts fit together and do not leak. Scaling the 3D files is NOT recommended.
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Please wait while we load your design.

Select an SVG file to create your pot's mold. You can use this empty template SVG as a starting point (you'll need to draw your own pot profile in it).

Shape Cast supports one part plaster molds (there cannot be any undercuts). Draw the profile with the center of the foot at the bottom left and the rim at the top right. See the SVGs on the Vessels page for examples of SVG profiles and the associated forms Shape Cast creates automatically from that input.

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Review your design and adjust the size if needed. The grid is 25mm (about 1 inch) spacing.

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Drag the 3D preview to rotate and check your design from all angles. Also double check the size (if it is wrong here, the 3D models will also be wrong and should not be scaled).

Shape Cast will next create a design proof. This is a to scale model of your pot. It also estimates your pot's volume using your selected wall thickness. Shape Cast will next create a design proof. This is a to scale model of your pot. It also estimates your pot's volume using a wall thickness of mm. ⓘ Enable to specify your own wall thickness. It also lets you specify your clay shrinkage so the final pot dimensions are exact, and access additional Shape Cast mold parameters.

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Configure your Shape Cast mold. ⓘ Use to specify your exact clay shrinkage so the final pot dimensions are exact and access additional Shape Cast mold parameters including STL/STEP file formats and slip well options.

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Your Purchased Handles

Sizes

Purchase "" Models

Basic

Pro

Remove the sample watermark from the 3D models:

  • Clean 3D Models:Basic 3D models you can use to pour plaster

High-res 3D models plus these advanced controls:

  • Clay Shrinkage: For accurate pot dimensions
  • Wall Thickness: For precise volume calculations
  • File Formats: Options for STEP or high-res STL
  • Advanced Controls: Slip well size and flange options

Pro Features

Pro

High-res 3D models plus these advanced controls:

  • Clay Shrinkage: For accurate pot dimensions
  • Wall Thickness: For precise volume calculations
  • File Formats: Options for STEP or high-res STL
  • Advanced Controls: Slip well size and flange options

Purchase pro mode once the design is complete.

Sign In to Shape Cast

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New User Bonus

Details

  • Once purchased, you can download a ZIP that contains high res STEP and STL files of the 3D models ready for 3D printing. The download link will be in Shop > Vessels > Scala Cira.
  • Print the molds, use binder clips to assemble the parts, and pour plaster directly into the 3D prints (no silicone needed!).

The perfect handle to pair with your new vessel. This handle is 50mm (~2") measured from top to bottom and extends out 40mm (1 5/8") and either end can be trimmed off when attaching to your pot.

Details

  • Once purchased, you can download a ZIP file that contains high res STEP and STL files of the handle ready for 3D printing. The download link will be in Shop > Handles > Fenu.
  • Two-part plaster mold with identical halves for slip casting handles.
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