Skim milk, vinegar, baking soda, measuring cup, heat proof container, tablespoons, coffee filter, small plastic funnel, Popsicle sticks, small paper or plastic cups, masking tape, string, large bowl, kitchen food scale or a digital bathroom scale, and a minimum of 4 commercial white glues: Scotch® Quick Drying Tacky White Glue, Elmer's All Multipurpose White Glue®, Amos® White Craft Glue, Blick® Multi-Purpose White Glue. Also, safety goggles, apron, and gloves along with a Tri-fold display board. The food items (milk, vinegar, baking soda, coffee filters) can be purchased from the local supermarket. The commercial glues, cups, plastic funnel, masking tape, etc are available from a major retail (Wal-Mart, Target, Dollar General, etc) discount department store, and the Popsicle or craft sticks along with the Tri-fold display board can be purchased from an art & craft store. Introduction Casein is the principle protein of milk. It accounts for approximately one third of the non-aqueous (liquid) ingredients in cow's milk, from which commercial casein is obtained. The Casein protein can be used to make glue and in addition, casein is used in manufacturing of various goods including fabrics, adhesives, plastics, and protective coatings. In order to remove the casein from the milk, the product goes through a process known as precipitation. Essentially, the milk is heated and acid is added (vinegar). As the heating takes place, the casein content begins to shrink and expel moisture producing clumpy white solid curds and liquid whey. The next step in extracting the casein involves separating the whey from the curd by filtering. After the separation, a baking soda solution is added to neutralize the acid the curd is then subjected to pressure to further remove the water content. When the moisture content is reduced to an acceptable level, the curd is dried to form a hard plastic-like protein substance called casein, which can act as an adhesive. Digital photos can be taken during the experimenting process and the following websites offer down loadable related images that can be used on the display board: http://eggheadmarketing.files.wordpress.com/2008/02/glue.jpg http://cdn.dickblick.com/items/238/72/23872-group-1-3ww-l.jpg http://www.optimumnutrition.com/products/images/natural-casein-facts.jpg http://farm3.static.Flickr.com/2359/2379620937_85bba049b8.jpg?v=0 Research Questions
There is casein in some glue, particularly label glues.
Some label glues contain casein.
Usually it's a casein glue
Eighty percent of the protein in milk is casein. The word is related to cheese. Casein is the glue used to put the labels on beer bottles and to hold furniture together. Maybe you can find it at GNC.
It's not the best thing to glue them with.
Casein glues are used in woodwork and cardboard box making.
One of the easiest glues to make at home is casein glue, it is made by curdling milk with vinegar or another mild acid. The white curds produced become the glue.
National Casein
One ingredient, in common crafting-glue, (white, liquid, non-toxic)--is called Casein, which is also an ingredient in "cheese-food" products....
I believe it's casein .
Through a chemical reaction between the Casein protein and an alkaline mixture together with fillers. Adding water will not extend its shelf life only weaken the glue.
A type of casein glue usually holds labels on.