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TECHNOLOGY OF MANUFACTURING CASEIN GLUE

Take cottage cheese (casein) also gradually add it to a saturated borax solution, until the cottage cheese is no longer dissolved. It turns out a thick transparent liquid, which has a great stickiness, suitable for labeling, postage stamps, etc. Before the label, the object should be slightly moistened. Adding to this glue several drops of liquid formalin Schering can make it durable.

Casein glue is used for gluing wood, preferably with pressing, cardboard, but it is also similar to gluing wood, also cardboard paper, fabric, skin. Casein, which is a luminous powder, is bred in cold water up to the density of sour cream, pouring water in small portions and thoroughly mixing for 40-50 minutes. Ready adhesive for use in an hour and a half. Apply the glue with a brush to both glued surfaces, which after 4-6 minutes are tightly compressed also withstand at least 6-8 hours . Full drying will occur in 18-20 hours.

The dried glue is much more resistant to high temperature and humidity than joinery glue. The addition of aluminum alum ( 100 g / l ) acts as a glutinous association more water resistant. The glue needs to be antisepted, in another way, if the hygroscopic materials do not dry out quickly, mold is formed and the details can be spoiled. For antiseptics, the glue is diluted in a 10-15% solution of ammonia (ammonia alcohol) or add 200 g / l of borax to it. It should be remembered that the glue leaves spots, especially noticeable on light wood, and over time, these specks can be made more contrast.

Overwhelmed (more than 4-6 hours ) also thickened glue should not be diluted with water: it lost its gluing ability.