bcfossilcollector Posted September 8, 2019 Share Posted September 8, 2019 Just a question regarding the resin transfer method. I’m looking at a Keichousaurus fossil that I am considering purchasing. While the fossil looks good the seller has stated that the matrix was very unstable and he utilized the resin transfer method to stabilize the matrix. How effective is this method? The matrix looks very thin to me and any inquiries have gone unanswered. I do not have any photos of this specimen but I can direct anyone interested via pm to the very popular site the specimen is selling on. If that’s not a violation of forum rules. Thanks. Link to comment Share on other sites More sharing options...
Randyw Posted September 8, 2019 Share Posted September 8, 2019 I could easily be wrong but the only resin transfer method that I know of is when you are making a copy of something...the one o know is the RTM also known as the resin transfer molding method....but I’m sure the experts know things I don’t. Although the lack of response would make me concerned 1 Link to comment Share on other sites More sharing options...
Randyw Posted September 8, 2019 Share Posted September 8, 2019 This is my RTM one. It’s a fake of course. I knew that getting it but for $20 I wasn’t concerned LOL! 1 Link to comment Share on other sites More sharing options...
bcfossilcollector Posted September 8, 2019 Author Share Posted September 8, 2019 51 minutes ago, Randyw said: This is my RTM one. It’s a fake of course. I knew that getting it but for $20 I wasn’t concerned LOL! Very interesting. I know that some of the Messel Pit fossils have been preserved? using this method but I know nothing of it. Hey it’s a great replica! Link to comment Share on other sites More sharing options...
Fossildude19 Posted September 8, 2019 Share Posted September 8, 2019 46 minutes ago, Randyw said: I could easily be wrong but the only resin transfer method that I know of is when you are making a copy of something...the one o know is the RTM also known as the resin transfer molding method....but I’m sure the experts know things I don’t. Although the lack of response would make me concerned Resin Transfer Technique. from:Fossil Museum.net It is a legitimate technique, but I haven't ever seen it used on Keichousaurs. Any pictures available? 4 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
bcfossilcollector Posted September 8, 2019 Author Share Posted September 8, 2019 @Fossildude19 thank you for the information. I’ll try to see if the seller will send me some sharper images. Link to comment Share on other sites More sharing options...
FossilDAWG Posted September 8, 2019 Share Posted September 8, 2019 I think the method has also been used to prepare Cretaceous fish from Lebanon. In that case, the exposed side of the fossil is embedded in resin, and then the opposite side is acid prepped. The result is an almost matrix-free skeleton on the surface of the resin, with exquisite presentation of the bones for research. Like Tim I have not heard of this method being used for Keichousaurus but I see no reason why it couldn't be used. The result is a cleaned fossil in acrylic, not just a copy. Don 2 Link to comment Share on other sites More sharing options...
bcfossilcollector Posted September 8, 2019 Author Share Posted September 8, 2019 That would explain why the matrix is so thin. Thanks Link to comment Share on other sites More sharing options...
Randyw Posted September 8, 2019 Share Posted September 8, 2019 I learned something new today! Link to comment Share on other sites More sharing options...
oilshale Posted September 8, 2019 Share Posted September 8, 2019 The Messel Transfer technique is a widely used preparation method and can be used with many substrates - partly in combination with chemical preparation. Examples are finds from Messel, Solnhofen and Frauenweiler in Germany, Lebanon, the Crato Formation in Brazil, Green River Formation, Monte Bolca in Italy, Gracanica in Bosnia and Herzegovina and many more. Examples: Challenges encountered during acid resin transfer preparation of fossil fish from Monte Bolca.pdf https://www.researchgate.net/publication/331084284_The_resin_transfer_technique_An_application_to_insect_fossils_in_laminated_limestones_of_the_Crato_Formation_Lower_Cretaceous_of_north-east_Brazil 5 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
oilshale Posted September 8, 2019 Share Posted September 8, 2019 8 hours ago, FossilDAWG said: I think the method has also been used to prepare Cretaceous fish from Lebanon. In that case, the exposed side of the fossil is embedded in resin, and then the opposite side is acid prepped. The result is an almost matrix-free skeleton on the surface of the resin, with exquisite presentation of the bones for research. Like Tim I have not heard of this method being used for Keichousaurus but I see no reason why it couldn't be used. The result is a cleaned fossil in acrylic, not just a copy. Don It is possible. With this method, I saved one or the other Keichousaurus, which was "prepped" with a rotating grinder (and completely ruined). For this purpose, the front side is cast in polyester or epoxy resin. After hardening, the fossil is chemically prepped from the back (with acid). Unfortunately I don't have any pictures of the result at the moment. 3 Be not ashamed of mistakes and thus make them crimes (Confucius, 551 BC - 479 BC). Link to comment Share on other sites More sharing options...
Bobby Rico Posted September 8, 2019 Share Posted September 8, 2019 My Keichousaurus was acid prepped in the U.K. . The matrix is about a 1cm thick it has also a stop out varnish made of resin on the back . This is to strengthen the fossil and stop the acid eating the back of the plate. It also stops the acid weakening to quickly 2 Link to comment Share on other sites More sharing options...
bcfossilcollector Posted September 8, 2019 Author Share Posted September 8, 2019 @oilshale Fascinating information! Thank you. Link to comment Share on other sites More sharing options...
Harry Pristis Posted September 8, 2019 Share Posted September 8, 2019 Here's another example: 3 http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
DLB Posted September 12, 2019 Share Posted September 12, 2019 I believe the fossil you are talking about was done buy coating one side of the fossil with a resin and then they allowed the rock to dissolve in acid leaveing just the bones on the resin layer. 1 Link to comment Share on other sites More sharing options...
Welsh Wizard Posted September 13, 2019 Share Posted September 13, 2019 I’ve had a few of my fossils done like this. Here’s a Dapedium that was resin backed and then acid prepped: Link to comment Share on other sites More sharing options...
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