It is what striking gold by hammer, and makes gold to stretching thinly (like foil state). It is equivalent to so called "Gold leaf" in English.
In product of Yamada Heiando, by coating lacquer on "Kin-paku", "Kin-paku" will hard to come off.
In Yamada Heiando writes, "Hon-Kin-paku" is made from gold itself,"Kin-paku" is a thing which is using gold paint and try to create texture close to "Hon-Kin-paku".