How to Melt Hide Glue
Hide glue is a long-standing favorite adhesive in woodworking and joinery. Hide glue is a protein-based adhesive manufactured from cow hides, bones and connective tissue. It is sold in granule or flake form and needs to be soaked in water then melted down using a double boiler and held at 140 degrees for use. Special glue melting pots are available, but not necessary.
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Instructions
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Preparing Dry Glue for Heating
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Mix one cup dry granules with one cup water in the top half of a double boiler.
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Let soak for approximately 30 minutes.
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3
Fluff mixture with stirring stick or spatula. Granules should be moist and almost all water should be absorbed. If the mixture appears dry or sticky, add an additional 1/4 cup water and allow to soak another 15 minutes.
Preparing the Double Boiler
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Fill the bottom of the double boiler with water to the recommended level and begin heating so that it is hot and ready to go when the glue has finished soaking
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Put the top on the double boiler. Heat on low while the glue begins to dissolve, stirring occasionally.
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Raise the burner heat to medium once the glue has dissolved.
Getting it Right
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Insert a meat thermometer into the glue pot to monitor temperature.
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Adjust heat accordingly, making sure the glue stays at a constant temperature of 140 degrees once it has completely dissolved.
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Glue can be held for use for long periods of time as long as the temperature is kept constant, although small amounts of water may need to be added as evaporation occurs over time.
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Tips & Warnings
Unused glue can be stored in the refrigerator for weeks. It can be reheated and used again and again without any loss of effectiveness.
