I too was thinking along these lines. Whitey, your explanation of ceramics is most helpful!
If we know how and what is necessary (color forming substance, temperature and atmosphere), it seems that the carbon process provides the most desirable avenue for high quality ceramic prints. The gelatin will just burn off. It won't melt unless it is saturated with water.
Caveat: Gelatin can be hardened by a variety of metallic salts, so not all are suitable for "glop". IIRC, a special "low ash" gelatin is used otherwise the fired finished can be prone to pitting and flaking.