A little bit more about In Glaze Lustre
There are 3 types of Lustre glazes, Clay paste, resin and 'In Glaze' reduction Lustre which was developed over 2000 years ago to get around a religious ban on eating off Gold plates - the potters at the time were asked to develop a glaze that would mimic gold! All of them use metal salts to create the lustrous effect but have very different ways of applying and firing.