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2. Limescale - Wikipedia

   en.wikipedia.org/wiki/Limescale

   Limescale build-up inside a pipe reduces both liquid flow through the pipe and thermal conduction from the liquid to the outer pipe shell. Both effects will reduce the pipe's overall thermal efficiency when used as a heat exchanger. Limescale is a hard, chalky deposit, consisting mainly of calcium carbonate (CaCO 3).

3. Filler (materials) - Wikipedia

   en.wikipedia.org/wiki/Filler_(materials)

   Filler materials are particles added to resin or binders (plastics, composites, concrete) that can improve specific properties, make the product cheaper, or a mixture of both. [1] The two largest segments for filler material use is elastomers and plastics . [ 2 ]

4. Liquid chalk - Wikipedia

   en.wikipedia.org/wiki/Liquid_chalk

   The term liquid chalk, or sharkchalk, refers to several different kinds of liquified chalk including liquid-chalk marking pens (with water-soluble ink), liquid-chalk mixtures (for athletic use: rock climbing, weightlifting, gymnastics), and liquid-chalk hobby-craft paints made of cornstarch and food coloring (some with small amounts of flour).

5. Calcium ammonium nitrate - Wikipedia

   en.wikipedia.org/wiki/Calcium_ammonium_nitrate

   The term "calcium ammonium nitrate" is applied to multiple different, but closely related formulations. One variety of calcium ammonium nitrate is made by adding powdered limestone to ammonium nitrate; [1] [2] another, fully water-soluble version, is a mixture of calcium nitrate and ammonium nitrate, which crystallizes as a hydrated double salt: [3] 5Ca(NO 3) 2 •NH 4 NO 3 •10H 2 O.

6. Chalk - Wikipedia

   en.wikipedia.org/wiki/Chalk

   [1] [2] It is composed mostly of tiny fragments of the calcite shells or skeletons of plankton, such as foraminifera or coccolithophores. [1] These fragments mostly take the form of calcite plates ranging from 0.5 to 4 microns in size, though about 10% to 25% of a typical chalk is composed of fragments that are 10 to 100 microns in size.

7. Cob (material) - Wikipedia

   en.wikipedia.org/wiki/Cob_(material)

   Cob, cobb, or clom (in Wales) is a natural building material made from subsoil, water, fibrous organic material (typically straw), and sometimes lime. [1] The contents of subsoil vary, and if it does not contain the right mixture, it can be modified with sand or clay.

8. The best stocking stuffers under $25 for everyone on your list

   www.aol.com/lifestyle/the-best-stocking-stuffers...

   Rabbit Wine and Beverage Bottle Stoppers (2 pack) $6 This two-pack of wine stoppers is probably the most affordable wine accessory you can buy from a name brand like Rabbit.

9. Whitewash - Wikipedia

   en.wikipedia.org/wiki/Whitewash

   Whitewash, calcimine, kalsomine, calsomine, asbestis or lime paint is a type of paint made from slaked lime (calcium hydroxide, Ca(OH) 2) or chalk (calcium carbonate, CaCO 3), sometimes known as "whiting". Various other additives are sometimes used.