rodrex Posted June 16, 2018 Share Posted June 16, 2018 Hi All, I have been reading through this chat about prep. I wanted to ask what would be best to glue a solnhofen fossil back together? I know that I have seen some fossils from there glued with a light brownish material that does not look like normal super glue. Also got any ideas about how to fill the missing matrix to make it a rectangular slab again? Would this be best with Apoxie Sculpt? I am looking for something that won't eat the limestone (acid-free). Looking forward to your suggestions. Kind regards Rod Link to comment Share on other sites More sharing options...
Ptychodus04 Posted June 16, 2018 Share Posted June 16, 2018 Post pics please. There are several options for repair but they are very dependent on condition of the specimen. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
oilshale Posted June 16, 2018 Share Posted June 16, 2018 2 hours ago, rodrex said: Hi All, I have been reading through this chat about prep. I wanted to ask what would be best to glue a solnhofen fossil back together? I know that I have seen some fossils from there glued with a light brownish material that does not look like normal super glue. Also got any ideas about how to fill the missing matrix to make it a rectangular slab again? Would this be best with Apoxie Sculpt? I am looking for something that won't eat the limestone (acid-free). Looking forward to your suggestions. Kind regards Rod The glue is " AKEMIE Marmorkitt 1000 Universal, juragelb." That's my favorite glue. It is a low-viscosity polyester resin - similar to Bondo Fiberglass resin in the USA (but without glassfiber) which is mixed with rock flour from Solnhofen and therefore has exactly the same color as the rock. The adhesive cures in about 10 minutes after the addition of peroxide. There are different types: colourless, juragelb, extra thin and thixotropic. Thomas 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...
caldigger Posted June 16, 2018 Share Posted June 16, 2018 So I am curious, from your statement above. Can you mix regular fiberglass resin (same used for surfboards ) with the native matrix to fill in voids without discoloration? Link to comment Share on other sites More sharing options...
oilshale Posted June 16, 2018 Share Posted June 16, 2018 This is not regular fiberglass resin - this is specially made for repair of Solnhofen- and Treuchtlinger-Marble slabs. But in principle you can do that. I use for coloring mineral powder - titanium dioxide for white, various iron oxides for brown tones and manganese dioxide for black. You can buy the whole colour Palette. However, the "normal" fiberglass resin is too viscous, hardens too quickly and is yellow in colour. If you dye it with rock flour, it can become very viscous and and there is a change in oolor. I think Akemie contains a higher proportion of monomer styrene as thinner I always adjust the colour of glued joints (if they are slightly wider) or use clear cyanoacrylate for very well-fitting parts. Fibreglass resin shrinks during curing and can therefore crack - large areas should not be repaired with it (several centimetre-long missing parts). Epoxides are better suited for this - they do not shrink as much. 2 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...
rodrex Posted June 17, 2018 Author Share Posted June 17, 2018 20 hours ago, oilshale said: The glue is " AKEMIE Marmorkitt 1000 Universal, juragelb." That's my favorite glue. It is a low-viscosity polyester resin - similar to Bondo Fiberglass resin in the USA (but without glassfiber) which is mixed with rock flour from Solnhofen and therefore has exactly the same color as the rock. The adhesive cures in about 10 minutes after the addition of peroxide. There are different types: colourless, juragelb, extra thin and thixotropic. Thomas thanks Thomas, appreciate this very much. Link to comment Share on other sites More sharing options...
rodrex Posted June 19, 2018 Author Share Posted June 19, 2018 On 16/06/2018 at 9:54 PM, Ptychodus04 said: Post pics please. There are several options for repair but they are very dependent on condition of the specimen. Ill post some photos soon! Promise Link to comment Share on other sites More sharing options...
JohnBrewer Posted June 20, 2018 Share Posted June 20, 2018 John Map of UK fossil sites Link to comment Share on other sites More sharing options...
rodrex Posted June 22, 2018 Author Share Posted June 22, 2018 as you can see, needs quite a bit of work.. Link to comment Share on other sites More sharing options...
Ptychodus04 Posted June 22, 2018 Share Posted June 22, 2018 Ouch! That looks like something painful happened to it. If it were my job, I would piece it all together with cyanoacrylate and fill the cracks with Apoxie Sculpt. It can be purchased in several colors so you can match it to the color of the matrix and the bone. I would apply a thin layer of Apoxie Sculpt to the back to support the repaired cracks since there are so many of them. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
Taogan Posted June 22, 2018 Share Posted June 22, 2018 I used to collect a bit in Bavaria and often got reject specimens from dealers that looked a bit like this. What I used to do was trim them down as much as possible then use the bits I trimmed off, powdered and mixed with glue, to make a filler that matched the rock. It will always look very repaired though, there is no way of reproducing the dendrites convincingly Link to comment Share on other sites More sharing options...
rodrex Posted June 23, 2018 Author Share Posted June 23, 2018 20 hours ago, Taogan said: I used to collect a bit in Bavaria and often got reject specimens from dealers that looked a bit like this. What I used to do was trim them down as much as possible then use the bits I trimmed off, powdered and mixed with glue, to make a filler that matched the rock. It will always look very repaired though, there is no way of reproducing the dendrites convincingly thanks Taogan Link to comment Share on other sites More sharing options...
rodrex Posted July 23, 2018 Author Share Posted July 23, 2018 I was thinking too... Would anyone know what taxon this likey represents? Unfortunately, due to its incompletness I'm not sure. Link to comment Share on other sites More sharing options...
Ptychodus04 Posted August 4, 2018 Share Posted August 4, 2018 @piranha can probably figure this out. Regards, Kris Global Paleo Services, LLC https://globalpaleoservices.com http://instagram.com/globalpaleoservices http://instagram.com/kris.howe Link to comment Share on other sites More sharing options...
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