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Weighing paper is often used when weighing solid, powdery substances on an
Weighing paper is usually made through a process called calendering. First, a chemically manufactured paper pulp fiber is broken down and squeezed into the mold where it will dry into the sheet. Then, this sheet will be rolled down by hot roller. As a result, the pulp fiber will be flat and in the same direction. To make the paper very smooth and moist-resistant, it goes through the process repetitively, called super-calendering.
File:Paraffin_paper.jpg
Weighing paper is often used when weighing solid, powdery substances on an analytical balance
An analytical balance (or chemical ''balance'') is a class of balance designed to measure small mass in the sub-milligram range. The measuring pan of an analytical balance (0.1 mg resolution or better) is inside a transparent enclosure with do ...
. By preventing the substance from making contact with unwanted materials, the precision of the measurement may be increased.
Production
Weighing paper is usually made through a process called calendering. First, a chemically manufactured paper pulp fiber is broken down and squeezed into the mold where it will dry into the sheet. Then, this sheet will be rolled down by hot roller. As a result, the pulp fiber will be flat and in the same direction. To make the paper very smooth and moist-resistant, it goes through the process repetitively, called super-calendering.
Uses
Weighing paper can be folded into different shape depending on its uses. #Origami pouch:Origami
) is the Japanese art of paper folding. In modern usage, the word "origami" is often used as an inclusive term for all folding practices, regardless of their culture of origin. The goal is to transform a flat square sheet of paper into a ...
pouch is a pocket-like shaped weighing paper that can be usually used for handling powdery, slippery samples.
# Weighing boat: Weighing boat is a box-like folded weighing paper that can be usually used for handling solid, gunky samples.
Types
# Low-nitrogen
Nitrogen is a chemical element; it has Symbol (chemistry), symbol N and atomic number 7. Nitrogen is a Nonmetal (chemistry), nonmetal and the lightest member of pnictogen, group 15 of the periodic table, often called the Pnictogen, pnictogens. ...
weighing paper: Low-nitrogen weighing paper is the most common type of weighing paper that is used for analytical balances in the labs. The smooth texture prevents gunking up and absorption of samples on the paper.
# Sulfur
Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms ...
-free weighing paper: Sulfur-free weighing paper is usually used for weighing food
Food is any substance consumed by an organism for Nutrient, nutritional support. Food is usually of plant, animal, or Fungus, fungal origin and contains essential nutrients such as carbohydrates, fats, protein (nutrient), proteins, vitamins, ...
materials. It is made up bleach
Bleach is the generic name for any chemical product that is used industrially or domestically to remove color from (i.e. to whiten) fabric or fiber (in a process called bleaching) or to disinfect after cleaning. It often refers specifically t ...
ed glassine pulp
Pulp may refer to:
* Pulp (fruit), the inner flesh of fruit
* Pulp (band), an English rock band
Engineering
* Pulp (paper), the fibrous material used to make paper
* Dissolving pulp, highly purified cellulose used in fibre and film manufacture
...
and paper
Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, Textile, rags, poaceae, grasses, Feces#Other uses, herbivore dung, or other vegetable sources in water. Once the water is dra ...
. As a result, it prevents the reaction of sample with other organic solvents such as alcohol
Alcohol may refer to:
Common uses
* Alcohol (chemistry), a class of compounds
* Ethanol, one of several alcohols, commonly known as alcohol in everyday life
** Alcohol (drug), intoxicant found in alcoholic beverages
** Alcoholic beverage, an alco ...
, or acetone
Acetone (2-propanone or dimethyl ketone) is an organic compound with the chemical formula, formula . It is the simplest and smallest ketone (). It is a colorless, highly Volatile organic compound, volatile, and flammable liquid with a charact ...
.
Sizes
The weighing paper is provided in different sizes : 6in by 6in, 4in by 4in, and 3in by 3in.See also
* GlassineReferences
{{Laboratory equipment Laboratory equipment