DESCRIPTION-> Click "Learn more about this item" for article & instructions!
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This is a non-food grade of starch which can be used for paper mache, replacing flour in the formula. To make liquid starch mix 2 teaspoons of corn starch with 2 tablespoons of cold water. Boil 1 1/2 cups of water and add the starch/cold water. Liquid starch is preferred to a flour mixture because it's more slippery and cohesive, making it easier to spread on the paper strips.
Starch is a carbohydrate commonly found in foods like corn, wheat, potatoes, and cassava. It's the most common carbohydrate produced, made of glucose molecules attached together with glycosidic bonds. Starch consists of two molecules, amylose and amylopectin. Starch is insoluble in cold water but soluble in warm water. Unmodified starch only gels in water close to boiling point. When mixed with warm water it makes a paste called "Wheatpaste" which was historically used when hanging wallpaper. Wheatpaste: "(also known as flour and water paste, flour paste, or simply paste) is a gel or liquid adhesive made from wheat flour or starch and water. It has been used since antiquity for various arts and crafts such as book binding, découpage, collage, papier-mâché, and adhering paper posters and notices to walls" -Wikipedia, Wheatpaste. The largest non-food use for starch is in papermaking as an adhesive. Also used historically, clothing starch is put on textiles and ironed to stiffen then.
Starch Sugars:
Starch can be broken down by dissolving some of its glycosidic bonds to make simpler sugars such as maltodextrin (which we also carry), corn syrups, high fructose syrups, and Dextrose which is the sugar produced when all glycosidic bonds are broken down. Maltodextrin has the fewest glycosidic bonds broken.
Non-food starch uses include (from Wikipedia):
Papermaking:
"In a typical sheet of copy paper for instance, the starch content may be as high as 8%. Both chemically modified and unmodified starches are used in papermaking. In the wet part of the papermaking process, generally called the "wet-end", the starches used are cationic and have a positive charge bound to the starch polymer. These starch derivatives associate with the anionic or negatively charged paper fibers / cellulose and inorganic fillers. Cationic starches together with other retention and internal sizing agents help to give the necessary strength properties to the paper web formed in the papermaking process (wet strength), and to provide strength to the final paper sheet (dry strength).
In the dry end of the papermaking process, the paper web is rewetted with a starch based solution. The process is called surface sizing. Starches used have been chemically, or enzymatically depolymerized at the paper mill or by the starch industry (oxidized starch). The size/starch solutions are applied to the paper web by means of various mechanical presses (size presses). Together with surface sizing agents the surface starches impart additional strength to the paper web and additionally provide water hold out or "size" for superior printing properties. Starch is also used in paper coatings as one of the binders for the coating formulations which include a mixture of pigments, binders and thickeners. Coated paper has improved smoothness, hardness, whiteness and gloss and thus improves printing characteristics."
Cardboard adhesive:
"Starch glues are mostly based on unmodified native starches, plus some additive such as borax and caustic soda. Part of the starch is gelatinized to carry the slurry of uncooked starches and prevent sedimentation. This opaque glue is called a SteinHall adhesive. The glue is applied on tips of the fluting. The fluted paper is pressed to paper called liner. This is then dried under high heat, which causes the rest of the uncooked starch in glue to swell/gelatinize. This gelatinizing makes the glue a fast and strong adhesive for corrugated board production."
Clothing starch:
"Clothing or laundry starch is a liquid prepared by mixing a vegetable starch in water (unmodified starch only gels in water close to boiling point, while commercial products may not require heat), and is used in the laundering of clothes. Starch was widely used in Europe in the 16th and 17th centuries to stiffen the wide collars and ruffs of fine linen which surrounded the necks of the well-to-do. During the 19th and early 20th century it was stylish to stiffen the collars and sleeves of men's shirts and the ruffles of women's petticoats by starching them before the clean clothes were ironed. Starch gave clothing smooth, crisp edges, and had an additional practical purpose: dirt and sweat from a person's neck and wrists would stick to the starch rather than to the fibers of the clothing. The dirt would wash away along with the starch; after laundering, the starch would be reapplied. Starch is available in spray cans, in addition to the usual granules to mix with water."
Bioplastic (such as packing peanuts):
"Starch is an important natural polymer to make bioplastics. With water and plasticisers such as glycerol, starch can be processed into so-called "thermoplastic starch" using conventional polymer processing techniques such as extrusion, injection molding and compression molding. Since materials based on only native starch have poor processability, mechanical properties and stability, more commonly modified starches (e.g. hydroxypropyl starch) are used and starch is combined with other polymers (preferably biodegradable polymers such as polycaprolactone)"
Other:
"Another large non-food starch application is in the construction industry, where starch is used in the gypsum wall board manufacturing process. Chemically modified or unmodified starches are added to the stucco containing primarily gypsum. Top and bottom heavyweight sheets of paper are applied to the formulation, and the process is allowed to heat and cure to form the eventual rigid wall board. The starches act as a glue for the cured gypsum rock with the paper covering, and also provide rigidity to the board.
Starch is used in the manufacture of various adhesives or glues for book-binding, wallpaper adhesives, paper sack production, tube winding, gummed paper, envelope adhesives, school glues and bottle labeling. Starch derivatives, such as yellow dextrins, can be modified by addition of some chemicals to form a hard glue for paper work; some of those forms use borax or soda ash, which are mixed with the starch solution at 50–70 °C (122–158 °F) to create a very good adhesive. Sodium silicate can be added to reinforce these formula."
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