Sanzenbon nikawa glue is prepared in the following way: First put into water so that the glue absorbs enough water, then dissolve the sodden glue slowly by immersion in hot water.
三千本膠の使用方法は煮る前に水にひたし十分に水分を含ませておいて、ふやけた膠を湯煎でゆっくりと溶かす。