How glue is made - material, manufacture, making,
How Glue is Made - Process of Glue Manufacturing. Glues are one of the oldest materials that were made by our prehistoric ancestors. Natural “single component” materials such as birch-bark-tar were found even in the archeological findings that are 200 thousand years old, and by 70 thousand AD, our ancestors started mixing glues that consist from several components (with …
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