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Dear Sylvia, The most suitable resin for your needs would depend largely on the size of the specimens and on what you intend to do with the casts. What specimens are the moulds of, and how large are they? Also, are the casts intended for handling (they will need to be robust more than anything else), display (they don't need to be robust but will need to be painted), research (they don't necessarily need to be painted) or something else? With best wishes, Nigel. Nigel R. Larkin BA MSc - Freelance conservator and curator at Natural-History-Conservation.com - Affiliated Researcher, Cambridge University Museum of Zoology. - Research Associate (Geology), Norfolk Museums and Archaeology Service. - Associate Member of the Ancient Human Occupation of Britain Project. http://www.natural-history-conservation.com http://norfolk.academia.edu/NigelLarkin https://www.researchgate.net/profile/Nigel_Larkin http://www.facebook.com/#!/pages/Natural-History-Conservation/119346798095177 https://twitter.com/MrIchthyosaurus Telephone: 07973 869613 > Dear All > > > > We are casting some fossil replicas from borrowed silicon rubber moulds. We > would appreciate advice re suitable resins (a web search has revealed that > they are many and varied), especially from colleagues who have recent > experience of this type of work. > > > > Many thanks > > Sylvia > > > > Sylvia Humphrey > > Assistant Keeper of Geology > > The Great North Museum: Hancock > > Barras Bridge > > Newcastle upon Tyne > > NE2 4PT. > --------------------------------------------------- This mail sent through http://www.easynetdial.co.uk