1. Progress Report: Week 2 February 16, 2006 Manotech Associates Jina Kim Forrest Liau David Lin Teresa Wang

2. Product Proposal Customized prosthetic hand The “Manotech Approach”  Low-cost, self do-it kit Consumer ease  Reversible mold Innovative process

3. Progress Overview Components of Focus  Underlayer  Mold Justification  More fundamental parts for shape and function Work  Interviews  Development of component material specifications  Materials research

4. Interview 1: Dr. Samuel Koo BU Dental Phone interview with Forrest Recommended dental mold materials  Polyether Gives more detailed mold  Silicon addition Less accurate

5. Interview 2: Professor Roylance Associate Professor of Materials Engineering, MIT Personal interview with Jina and David on 2.10.06 Recommendations on mold materials  Room temperature vulcanization (RTV)  Silicones and urethanes

6. Material Specifications: Underlayer & Mold Price  < $20 total for simple function, cosmetic appeal Solidification at Room Temperature Conformability Flexibility of material  Underlayer: to accommodate prosthetic function  Mold: to allow reversal Compatible with other materials in prosthetic

7. Mold Materials CompanyProductSpecifications US Composites 74-30 RTV Liquid Urethane Mold Rubber Hardness, Shore A: 30 Demold time: 24 hours Soft, stretchable TAP Plastics Urethane RTV Mold- Making System Hardness, Shore A: 30 Cure time: 24 hours Tear-resistant, good for detail PolycastRTV-885 Silicone Hardness, Shore A: 20 High strength, low viscosity, good for complex patterns

8. Underlayer Materials - Silicone Rubber Properties  Low shrinkage, high strength  Hardness, flexibility CompanyProductCure time Cure temp Price (per 2 lbs) Nicolas SarraPo Yo Putty 30/40 > 7 min. 23 deg C 26.00 Nicolas SarraEquinox 25/35 Fast 7 min. 23 deg C 34.30 Polytek Development Corp. PlatSil Gel-10 30 min. 25 deg C 45.00 Specialty Silicone Products SSP-2246115 deg CFree sample

9. Future Work More Interviews  Local make-up artists  Michael Rubner, Paula Hammond Materials Testing  Try out idea of a “reversible mold”  Underlayer flexibility, using toy endoskeleton

10. Visit Our Website http://web.mit.edu/3.042/team2_06/Welcome.html

11. More Information Our Website: http://web.mit.edu/3.042/team2_06/Welcome.html