Ceramic Kiln Fire Growth Rings Poster

Create a 4:5 vertical contemporary ceramics promotional poster. The core composition is 'Kiln Fire Growth Rings'. The image is presented from a direct overhead perspective. An irregular hand-thrown celadon tea bowl is located in the center. The bowl mouth is slightly elliptical. The glaze flows naturally from gray-cyan to moon-white. The rim retains an extremely thin iron-brown line. Glaze thickness, tiny bubbles, and handmade traces are realistically visible.

Around the tea bowl is not an ordinary tabletop, but six concentric circular material bands shaped by kiln firing temperatures: the innermost ring is wet dark clay, moving outward through semi-dry mud, bisque ware, initial melt glaze, green vitrified layer, and the outermost ring becomes an ivory-white glaze with slight crackle. Each ring is not a flat color circle but a material slice with real thickness, grain, and firing changes; local crackle patterns extend from the outer ring inward but cannot pass through the complete tea bowl.

The title 'KILN' is arranged along the left arc, using restrained high-contrast serif font; only 'CELADON / 1280°C' is written in the bottom right corner. Add a small rectangular glaze color sample in the upper right corner, showing the three-stage change from gray-cyan to moon-white, without using explanatory panel arrows.

Light comes from a large softbox in the upper left, highlighting ring height, glaze micro-reflections, and tea bowl shadows. The overall look combines museum collection photography with material experiment posters, but the reading center remains the product. Complete opaque rectangular background filling the canvas, no transparency channels, no black corners, no feathered cropping. No people, no flower branches, no piling up of oriental symbols, no gold borders, no existing brands, no watermarks.