Stereolithography:
Castable Resin


This Stereolithography material is intended for investment casting. It allows a very high detail resolution and can be burned out after shell building. It is typically used in the dental and jewelry industry to create individual parts or low quantities of one part.



Overview

Icon Technology

Technology

Stereolithography

Icon Colors

Colors

Blue

Icon Bounding Box

Max. Size

140 x 140 x 165 mm

Icon Pricing

Cost

$$$
(Medium)

Icon Lead Time

Lead Time

2 – 5 business days

Icon Accuracy

Accuracy

± 0.2% with a lower limit of 0.2 mm


Material-Details


Click on the topics of your interest.

Investment casting

The material is solely used for generating prototypes for investment casting. Typical applications are in the dental and jewelry industry. In general, the material allows a very high resolution and performs best with small, rather compact parts (e.g. used for jewelry). It can be fully removed by heat, similar to wax models.

Approximate price

  • Standard pricing
    • Set-up fee per part EUR 7.50 (excl. VAT or 8.93 incl. VAT)
    • Approx. EUR 3.00 / cm³ Material volume (excl. 19 % VAT., or 3.57 / cm³ incl. VAT)
    • Discount for larger quantities

Pricing factors

  • Material: For one-time orders or smaller quantities, the price is based on the material consumption of the part. In rare cases, orders are rejected if the part is too complex or expensive in production.
  • Other factors: For higher quantities, the post process finishing and total material consumption (incl. support structure material consumption) is considered for final pricing.

Look & Feel

  • The material is somewhat soft
  • The detail resolution is higher than in standard resin
  • Made for investment casting (can be fully removed by heat, similar to traditionally used wax)

Chracteristics

  • Low mechanic and thermal strength

Tensile
Strength

k.A.

Elongation
at break

k.A.

Modulus
of Elasticity

0.45 MPa

Flexural
strength

k.A.


Vicat A

k.A.

Shore
hardness

55D

Symbol wall thickness

Minimum Wall Thickness
The minimum wall thickness should be no less than 0,5 mm. For long structures or structures that face mechanical stress, the wall thickness should be increased accordingly.

Symbol cavities

Cavities
Cavities are not recommended with this material.

Symbol Clearance gap

Clearance gap
In case your file contains several shells, make sure to keep a clearance gap of min. 0,5 mm between the shells, otherwise they could be fused together. Please note, in case there are support structures needed between the parts, it might not be possible to remove them after printing. We recommend printing shells separately with this technology.

Symbol resolution

Resolution
The minimal details size should not be smaller than 0,3 mm.

Symbol interlocking parts

Interlocking parts
Due to the need of support structures, it is not recommended to print interlocking parts with Stereolithography. It is challenging to impossible to remove the support structures inbetween interlocking parts.

Symbol Bounding Box

Bounding box
The maximum size of the part cannot exceed 140 x 140 x 165 mm.

Standard-Finishing

  • Removing support structures an clean part from excess material
  • Sanding support structure scars (only accessible areas)
  • UV post-curing

Optional Finishing

  • Glass bead blasting on request

First, the 3D model is analyzed and support structures are added to the bottom and over-hanging areas. The complete model is then digitally disassembled into thin layers – these are the instructions for the 3D printer. The liquid resin is loaded in to the stereolithography 3D printer’s reservoir and a build platform is positioned close to the top of that reservoir. A UV laser draws the first of the thin layers on top of the platform – immediately hardening (i.e. photopolymerization) the resin in those areas. Thereby, the first layer of the model is printed and also attached to the build platform. The build platform is then moved down by a layer thickness (typically 100 microns) in the liquid and the UV laser draws the next layer, fusing it to the layer before it. This process then repeats until all the layers have been printed.

After all the layers have been printed the printing is complete and the model is removed from printer. After printing, the parts are cleaned, the support structure is removed and the part is post-cured by UV light to increase strength.

Stereolithography schematic. Source: 3D-Systems.