Elmer’s is a hide glue and is easily dulled.
Hate to disagree with you, but, Elmer’s isn’t a hide glue. There
are 2 types of Elmer’s Glue, the original white colored glue & a
cream colored glue sold as ‘Carpenter’s Wood Glue’. Both products
are mfgd. by the Borden Co. Borden originally was a dairy
products co. The main ingredient in the white Elmer’s glue is
caesin, a by product of processing whole cow’s milk. The cream
colored glue is a aliphatic resin glue.
Hide glues are usually mfgd from hides, hoves & other colagen
parts of animals.