This document summarizes Accura Amethyst Plastic, a stereolithography material optimized for rapid production of jewelry molds and prototypes. Key features include high accuracy, detail reproduction, thermal resistance, and compatibility with high-temperature rubber molding. The deep purple color allows for easy identification of parts. Example applications shown include a prototype helmet and a platform of 90 rings built automatically in 16.2 hours. Technical data is provided on tensile strength, hardness, heat resistance and other material properties.

1. STEREOLITHOGRAPHY
Accura® Amethyst Plastic
Optimized for the rapid and automated production of
patterns and master molds for jewelry manufacturing
Functional prototype helmet used for
durability testing
Applications
• Patterns for use with low and high
vulcanizing rubber molding
• High resolution concept models
Features
Benefits
• Outstanding accuracy
• Exceptional detail
• High thermal resistance
• Deep purple color
• Low ash formulation
• Parts are accurately produced in X,
Y and Z
• Small details are faithfully repro
duced
• Patterns are compatible with high
temperature rubber molding
operations
• Produces parts in a high contract
color for easy identification
• Material can be burned out for
direct casting
This platform of 90 rings was built in 16.2
hours - automatically.
This platform of 90 rings was built in 16.2
hours - automatically.

2. Liquid Material
Appearance Purple
Liquid Density @25 °C (77 °F) 1.1 g/cm³
Solid Density @25 °C (77 °F) 1.23 g/cm³
Viscosity @30 °C (86 °F) 350 cps
Penetration Depth (Dp)* 3.7 mils
Critical Exposure(Ec)* 14.4 mJ/cm²
Tested Build Styles EXACT™, FAST™, Exact HR™
STEREOLITHOGRAPHY
For use with Viper™ SLA® Systems
Technical Data
Post-Cured Material
Tensile Strength ASTM D 638 22 - 38 MPa
Tensile Modulus ASTM D 638 3,514 - 3,996 MPa 260 - 287 KSI
Elongation at Break (%) ASTM D 638 0.56 - 1.04 % 14 - 22 %
Flexural Strength ASTM D 790 87 - 125 MPa 7540 - 10300 PSI
Flexural Modulus ASTM D 790 3,652 - 3,721 MPa 220 - 300 KSI
Impact Strength (Notched Izod) ASTM D 256 9- 12 J/m 0.66 - 0.98 ft-lb/in
Heat Deflection Temperature ASTM D 648
@ 66 PSI
@ 264 PSI
77 °C
62 °C
170.6 °F
143.6 °F
Hardness, Shore D 87
Co-Effcient of Thermal
Expansion
ASTM E 831-93
TMA (T<Tg, 0-20 °C)
TMA (T<Tg, 90-150 °C)
57 x10-6 m/m °C
133 x10-6 m/m °C
Glass Transition (Tg) DMA, E” 103 °C 217.4 °F
* Dp/Ec values are the same on all solid-state laser SLA® systems.
3D Systems Corporation Tel: 803.326.4080 moreinfo@3dsystems.com
333 Three D Systems Circle Toll-free: 800.889.2964 www.3dsystems.com
Rock Hill, SC 29730 U.S.A. Fax: 803.324.8810 NASDAQ: TDSC
Warranty/Disclaimer: The performance characteristics of these products may vary according to product application, operating conditions, material combined
with, or with end use. 3D Systems makes no warranties of any type, express or implied, including, but not limited to, the warranties of merchantability or fitness
for a particular use.
© 2008 by 3D Systems, Inc. All rights reserved. Specifications subject to change without notice. The 3D logo, Accura and SLA are registered trademarks of 3D
Systems, Inc.
PN 70718 Issue Date - April 08
Accura® Amethyst Plastic
This platform of 90 rings was built in
16.2 hours - automatically.
Rubber molding is used to create
multiple wax patterns for casting.
Amethyst modles can be plated or
painted
Images courtesy of Alberto Bolzonella
Measurement Condition Value
Measurement Condition Metric U.S.
TM