Primary task is to repair damage from the rock without not exposed in the fossil chiseled out, stick to break up a complete dinosaur fossil, dinosaur bones in order to restore the true face, to facilitate experts to study. Personnel engaged in repair work, should possess a certain amount of dinosaur bones have learned, at least identification of exposed bone in the body which is part of the dinosaur bones, such as the dinosaur skull, spine, limbs, etc.
The first step is to repair out of the box. Packing box according to the inventory of successive open, how many out of the box the number of repair personnel should be determined. To be registered after unpacking. Fossil specimens from the rack by removing the origin and number of the specimens, first fossil origin, number registered in the repair work diary. Generally speaking, there are fossils of repair following two methods:
(1) mechanical repair method. Although in recent years, considerable progress has been repairing tools, but most are still using a hammer and chisel. Must take when using these tools within the fossil on the sand table, and some need to use different sizes of pillows in different parts of sand to maintain stability. Repair, a hammer, a chisel should have a destination, must be very careful not to damage the fossils. If you are experiencing rock hard, use electric engraving machine or doctor of dental fillings with a dental drill or machine or high-speed straight teeth machine. According to need and use pneumatic engraver or pen-type pneumatic drill.
(2) chemical treatment. In the discovery, in order to make the bad plaster fossils hardened, often drops nitrocellulose lacquer, the fossils in the fossil solidified around the surface of the soil and, if this happens, the repair material before instillation of dilute (ie, banana oil), to make it dissolve. If the fossil has cracks, when crack width of less than 1 mm, can be directly instilled curing adhesive; when the gap is large, will have to add filler at the gap, and broken mouth wash, then use glue or adhesive curing agent. Curing adhesive commonly used for the nitro varnish, acetone can be used as a diluent. Quick Adhesive common market (commonly known as 505, that is, cyanoacrylate) and polyester resin can be used as bonding agent. Fossils from the surrounding rock in order to completely remove the early 20th century, the international community has begun to use the acid treatment method. The most commonly used is acetic acid (acetic acid). The main components of fossil rock is calcium carbonate, and fossilized dinosaur bone composition is calcium phosphate, acetic acid can dissolve the rock, dinosaur fossils, but not dissolved, there would be separate bone from the rock out. Skeleton removed immediately after separation, washing and soaking with water, the time at least the same time with the acid soak, to the extent possible addition of acid. After cleaning, the fossil can be placed inside the drying oven 600C.