PROBLEM TO BE SOLVED: To provide a colored dental tentative calcined block for producing a dental restorative material using CAD/CAM, producing fine color expression in the dental tentative calcined block and capable of cutting the dental restorative material with a color close to the natural tint.SOLUTION: A production method of a dental tentative calcined block as the tentative calcined block colored with a coloring material comprises: further infiltrating a coloring material having a color different from the coloring material or an osmotic liquid including an osmotic agent, into the tentative calcined block infiltrated with a coloring liquid including the coloring material； and infiltrating the coloring material into the inside of the tentative calcined body.SELECTED DRAWING: Figure 1【課題】歯科用仮焼成ブロック中で細密な色表現を実現し、天然の色彩に近い歯科用修復物を切削できる、ＣＡＤ／ＣＡＭを用いて、歯科用修復物を作製する為の着色された歯科用仮焼成ブロックを提供する。【解決手段】着色材で着色された仮焼成体である歯科用仮焼成ブロックの作製方法であって、着色材を含む着色液を浸透させた仮焼成体に、更に、前記記載の着色材とは異なる色の着色材を含む着色液又は浸透液材を含む浸透液を浸透させ、仮焼成体の内部に着色材が浸透させる構成とする。【選択図】図１
