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The paper, after immersing in water for 4–5 weeks, is taken out and made into a pulp and dried. The dried paper is then converted to a powder. There is also a practice to mix the powdered paper with rice water to facilitate coagulation. [1] The pulp thus made is applied on molds made in wood or brass.
A common use is to make chains of paper rings, often from colored construction paper. It can also be used to create papier-mâché. In the fine arts, wheat starch paste is often used in preparation and presentation. A good wheat starch paste has a strength compatible with many paper artifacts, remains reversible over time, is neither too acidic ...
Papier-mâché with the strips method for the creation of a pig Papier-mâché mask created with the pulp method. There are two methods to prepare papier-mâché. The first method makes use of paper strips glued together with adhesive, and the other uses paper pulp obtained by soaking or boiling paper to which glue is then added.
The gelatinization temperature of starch depends upon plant type and the amount of water present, pH, types and concentration of salt, sugar, fat and protein in the recipe, as well as starch derivatisation technology are used. Some types of unmodified native starches start swelling at 55 °C, other types at 85 °C. [3]
The vanishing valentine experiment is another chemical reaction related to the blue bottle experiment. This reaction occurs when water, glucose, sodium hydroxide, and resazurin is mixed in a flask. When the solution is shaken, it turns from light blue to a reddish color. The solution turns back to a light blue after being left to stand for a while.
An inexpensive, non-toxic example of a non-Newtonian fluid is a suspension of starch (e.g., cornstarch/cornflour) in water, sometimes called "oobleck", "ooze", or "magic mud" (1 part of water to 1.5–2 parts of corn starch). [22] [23] [24] The name "oobleck" is derived from the Dr. Seuss book Bartholomew and the Oobleck. [22]
Experiment Observation Inference Substance in water + 3 mL Benedict's solution, then boil for few minutes and allow to cool. Red, green, or yellow precipitate is obtained Reducing sugar, such as glucose, is present Substance in water + 3 mL Benedict's solution, then boil for few minutes and allow to cool. Solution remains clear or is a little blue
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