Underglaze - Wikipedia

Ceramic glaze - Wikipedia

File:Blue-and-white Porcelain Bottle with Underglaze Iron and Copper Grass and Insects Design.jpg - Wikipedia

File:Joseon dynasty jar, 17th century, porcelain, Metropolitan Museum of Art, 2006.254.JPG - Wikipedia

Iznik ewer (article), Later period

Willow pattern - Wikipedia

File:Bowl from Egypt, Mamluk, underglaze-painted stonepaste, Honolulu Museum of Art.jpg - Wikipedia

underglaze — From the Potter — Friendship Farm & Pottery, LLC

File:Dish, Yongzheng Reign, 1723-1735, underglaze blue and overglaze doucai enamels on porcelain - National Gallery of Art, Washington - DSC09805.JPG - Wikipedia

Overglaze decoration - Wikipedia

Dragon jar - Wikipedia