Cow hide/bone glue. Glue from animal origin boiled from hides, bones extracted and processed into granules is a versatile glue that softens with heat. Gelatin is similar product in powder for easier preparation. Elastic and hard glue, guitar and musical instrument makers prefer this over synthetic glue as repairs is easy with heating when glued parts need to be taken apart. Gold gilding as a base coat. Kite makers often coat kite strings with glass shards in kite sky supremacy competition. A favoured glue to construct traditional bamboo, wood, horn laminate composite bows in archery other than EA-40 a flexible epoxy resin. Book binding in leather cover and spine reinforcement. Coating of feather fletching binding in arrows. Knife makers, wood sheath carvers and wood sculptors find animal glue easy to remove with application of heat. As a wood filler mix in wood dust and plaster powder is sufficient quantity to form a putty. Use immediately as cannot be stored. When set sand and stain to repair wood flaws.
To prepare glue pre soak granules or gelatin powder in water to swell before adding water and double boil with constant stirring to melt. Glue viscosity is based on water content to granules. Adding alum helps to preserve glue. Store glue in refrigerator and use within a week.
An organic protein glue increasingly hard to find. Durable to store in dry condition.
