Hide glues are great in low-humidity environments but can loosen in high humidity. They're useful for fixing musical instruments, for example, because hide glue

Hide glues are great in low-humidity environments but can loosen in high humidity. They're useful for fixing musical instruments, for example, because hide glue joints are reversible and repairable. Hide glued joints will release easily with the application of heat and steam. I was surprised to find that most older musical instruments have been repaired to a greater/lesser degree thanks to the use of hide glue. Bow makers (as in "bows and arrows") commonly used hide glues in regions of low humidity, but a Turkish bow composed of tendon, bone, sinew, wood, horn and hide glue likely will fail to function properly in a rainy-weather locale. Animal glue (includes hide glue as a subtopic): https://en.wikipedia.org/wiki/Animal_glue#Reemergence https://en.wikipedia.org/wiki/Animal_glue#Reemergence The Mongolian bow: http://www.coldsiberia.org/monbow.htm http://www.coldsiberia.org/monbow.htm The Modern Reproduction of a Mongol Era Bow based on historical facts and ancient technology research: https://exarc.net/issue-2017-2/at/modern-reproduction-mongol-era-bow-based-historical-facts-and-ancient-technology-research https://exarc.net/issue-2017-2/at/modern-reproduction-mongol... Here's a fellow who tried both a modern glue and hide glue in making a bow: A Note on Indian Bow Making or the Secrets of Sinew Revealed http://www.primitiveways.com/secrets_of_sinew.html http://www.primitiveways.com/secrets_of_sinew.html