Somos® GP Plus


Somos® GP Plus

Somos® GP Plus is a low-viscosity stereolithography resin with an opaque white appearance. This material mirrors production plastics like ABS and PBT, making it an ideal choice for virtually any applications.

Parts produced with Somos® GP Plus are durable, accurate and water and moisture resistant. This material is ideal for functional prototypes, concept models and low volume production parts.

Among the greatest advantages guaranteed by this material, we find:

  • Extremely accurate;
  • Excellent humidity resistance;
  • Very durable.
Mechanical Properties Test Method UV Postcure Metric UV Postcure Imperial
Tensile Strength ASTM D638M 37 MPa 5.4 ksi
Tensile Modulus ASTM D638M 2,510 MPa 364 ksi
Elongation at Break ASTM D638M 7.5% 7.5%
Elongation at Yield ASTM D638M 3% 3%
Flexural Strength ASTM D790M 67.3 MPa 9.8 ksi
Flexural Modulus ASTM D2240 10,000 MPa 319 ksi
Izod Impact (Notched) ASTM D256A 26 J/m 0.49 ft-lb/in
Poisson’s Ratio ASTM D638M 0.41 0.41
Hardness (Shore D) ASTM D2240 79 79
Water Absorption ASTM D570-98 0.40% 0.40%
Thermal/Electrical Properties Test Method UV Postcure Metric UV Postcure Imperial
C.T.E. -40 - 0°C (-40 - 32°F) ASTM E831-05 63 µm/m°C 35 µin/in°F
C.T.E. 0 - 50°C (32 - 122°F) ASTM E831-05 89 µm/m°C 49 µin/in°F
C.T.E. 50 - 100°C (122 - 212°F) ASTM E831-05 170 µm/m°C 95 µin/in°F
C.T.E. 100 - 150°C (212 - 302°F) ASTM E831-05 172 µm/m°C 96 µin/in°F
Dielectric Constant 60 Hz ASTM D150-98 3.8 3.8
Dielectric Constant 1 KHz ASTM D150-98 3.7 3.7
Dielectric Constant 1 MHz ASTM D150-98 3.4 3.4
Dielectric Strength ASTM D149-97A 17.9 kV/mm 454 V/mil
HDT @ 0.46 MPa (66 psi) ASTM D648 46°C 115°F
HDT @ 1.81 MPa (264 psi) ASTM D648 41°C 106°F
Liquid Properties      
Appearance Opaque White    
Viscosity ~340 cps @ 30°C    
Density ~1.16 g/cm3 @ 25°C    
Optical Properties      
EC 13.0 mJ/cm2 [critical exposure]  
Dp 6.25 mils [slope of cure-depth vs. In (E) curve]  
E10 64 mJ/cm2 [exposure that gives 0.254 mm (.010 inch) thickness]  

NOTICE : Somos® is a registered trademark of Royal DSM N.V. Somos® is an unincorporated subsidiary of DSM Desotech Inc. The information presented herein is based on generally accepted analytical and testing practices and is believed to be accurate. However, DSM Desotech expressly disclaims any product warranties which may be implied including warranties or merchantability and/or fitness for a particular purpose DSM Desotech’s products are sold subject to DSM Desotech’s standard terms and conditions of sale, copies of which are available upon request. Purchasers are responsible for determining the suitability of the product for its intended use and the appropriate manner of utilizing the product in purchaser’s production processes and applications so as to insure safety, quality and effectiveness. Purchasers are further responsible for obtaining necessary patent rights to practice any invention in connection with the use of purchased product and any other product or process. DSM Desotech reserves the right to change specifications of their products without notice. © 2015 DSM IP ASSESTS B.V. All rights reserved