Copying pencil Copying pencil A copying pencil, also indelible pencil or chemical pencil, is pencil whose lead contains a dye. The lead is fabricated by adding a dry water-soluble permanent dye to powdered graphite—used in standard graphite pencils—before binding the mixture with clay. Copying pencils were introduced in the 1870s and were originally marketed for copying documents, especially for making permanent copies of a permanent original. This was achieved by creating a hand-written document using a copying pencil, laying a moist tissue paper over the document and pressing down with a mechanical press. The water-soluble dye in the writing would be transferred
Lead poisoning in raptors has consumed a lead jig or sinker if a fishing line breaks. They may also try to attack a fish being pulled in by someone fishing/angling. There is also tackle that becomes disposed of or left behind in the water or on the fishing grounds, which birds may then accidentally consume. What makes this issue even worse is that lead is not an element that is quickly eliminated and cannot be degraded, as it is a very stable element. This results in a continuous accumulation of the concentration of lead in the environment over time, as there is more going