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2. Calcium Lime Rust - Wikipedia

   en.wikipedia.org/wiki/Calcium_Lime_Rust

   In this process, iron ions (Fe3+) are produced along with water, making the rust easier to remove without causing damage to the underlying metal or surrounding materials.. [citation needed] Maker. CLR is made by Jelmar LLC, an American company located in Skokie, Illinois. The company was founded in 1967 by Manny Gutterman.

3. Scratchboard - Wikipedia

   en.wikipedia.org/wiki/Scratchboard

   Scratchboard. Scratchboard or scraperboard is a form of direct engraving where the artist scratches off dark ink to reveal a white or colored layer beneath. The technique uses sharp knives and tools for engraving into the scratchboard, which is usually cardboard covered in a thin layer of white China clay coated with black India ink.

4. Piranha solution - Wikipedia

   en.wikipedia.org/wiki/Piranha_solution

   Piranha solution, also known as piranha etch, is a mixture of sulfuric acid ( H2SO4) and hydrogen peroxide ( H2O2 ). The resulting mixture is used to clean organic residues off substrates, for example silicon wafers. [1] Because the mixture is a strong oxidizing agent, it will decompose most organic matter, and it will also hydroxylate most ...

5. Fish stocking - Wikipedia

   en.wikipedia.org/wiki/Fish_stocking

   Fish stocking is the practice of releasing fish that are artificially raised in a hatchery into a natural body of water (river, lake, or ocean), to supplement existing wild populations or to create a new population where previously none exists. Stocking may be done for the benefit of commercial, recreational or tribal heritage fishing, but may ...

6. Nail file - Wikipedia

   en.wikipedia.org/wiki/Nail_file

   Nail file. A nail file is a tool used that can be used to gently grind down and shape the edges of nails. They are often used in manicures and pedicures after the nail has been trimmed using appropriate nail clippers. Nail files may either be emery boards, ceramic, glass, crystal, plain metal files or metal files coated with corundum .

7. Ikejime - Wikipedia

   en.wikipedia.org/wiki/Ikejime

   Ikejime. Tekagi (手鉤), the tool that is used for performing ikejime. Ikejime (活け締め) or ikijime (活き締め) is a method of killing fish which maintains the quality of its meat. [1] The technique originated in Japan, but is now in widespread use. It involves the insertion of a spike quickly and directly into the hindbrain, usually ...