Introduction

Sandstone is the only material capable of full-color 3D prints. Produced on Z-Corp printers, it is perfect for figurines, life-like models, avatars, and other products that lend themselves to colorful, high-quality printing. Models are created by printing binder material and colored ink layer-by-layer into a bed of gypsum-based powder. After printing, the models are finished with a cyanoacrylate (super glue) sealant to ensure durability and vivid colors. The final product is a hard, brittle material that works great for figurines and visual models, but isn’t well suited to functional parts or daily handing. Models should be handled carefully, and not exposed to water as it will cause fading.

Coated Full Color Sandstone goes through an additional processing step. A two part epoxy resin is brushed onto your product by hand, creating more vivid colors, additional strength, and a smoother surface finish.

When printing in this material, some variation in color shade is unavoidable, especially with difficult-to-produce colors such as browns and skin tones. We optimize each print run to make individual models look great, may see differences in color when looking at multiple prints of the same model side by side.

Full color sandstone
PropertiesSandstone
Tensile Strength - Ultimate
14.2 MPa
Elongation at Break
0.2 %
Flexural Strength
31.1 MPa
Flexural Modulus
7163 MPa
Modulus of Elasticity
9450 MPa

Pros

  • Sandstone like finish
  • Full color
  • Printing without support
  • Faster than FDM technique

Cons

  • Fragile
  • Not watertight
  • Not recyclable
  • Higher price than FDM
Price
Details
Time
Design tips

Maximum bounding box

250 × 380 × 200 mm

Minimum bounding box

X, Y,Z > 10 mm ( for separated parts)

Minimum embossed detail

0.4 mm high & wide thick

Minimum engraved detail

Z = 0.2 mm , Y = 0.3 mm

0.5 mm for readable text

Minimum engraved detail

0.4 mm high & wide thick

Minimum unsupported wall thickness

3.0 mm

A supported wall is connected on two or more sides. An unsupported wall is one connected to other walls on less than two sides. Walls in your model should be thicker than or equal to the minimum measurements suggested to ensure your model makes it through printing and cleaning. Walls that are too thin are prone to warping in the printing processing, or may break when we remove it from the printer and clean it. Walls and wires close to or slightly above the guidelines may still be rejected based on the geometry. For example, extra long wires or walls protruding from an object may be damaged during cleaning. Our production team will communicate with you if the design is too weak with tips on how to strengthen it.

Minimum supported wall thickness

2.0 mm

Minimum supported feature size

2.0 mm

Minimum unsupported feature size

3.0 mm

A geometry considered a wire when its thinner in both unconnected directions than its length. Wires that are under our suggested minimums are prone to breaking in the cleaning process.

Overhang and supports

No supports need in sandstone binder jetting

Clearance between parts

0.9 mm

Clearance is the space between an two parts, e.g. space between gears or a ball and socket joint.

Escape holes

Single Escape Hole Diameter : 35 mm
Multiple Escape Hole Diameter : 15 mm
When Full Color Sandstone products contain hollow cavities, they are often still filled with powder even after they are removed from the build tray. Small escape holes and difficult geometry can make it impossible to remove excess powder.
A single escape hole at the end of a cavity will not allow material in the corners near the escape hole to fully escape. So we recommend multiple escape holes at both ends of the cavity.