PROBLEM TO BE SOLVED: To easily and efficiently acquire information effective for individual identification such as identification confirmation, and to collect more information. SOLUTION: The tan δ 37 at 37 ° C. determined by dynamic viscoelasticity is 0.5 or less, the tan δ 80 at 80 ° C. is 0.1 or more, and the hardness measured by a type A durometer according to JIS K 7215: 1986. The impression material 1 has a resin material having an HDA of 60 or more and obtains the negative pattern of the tooth including the pattern on the labial surface of the tooth. In addition, the impression material 1 and a solution 5a such as a germicidal disinfectant and a deodorant are stored, and a closed container 5 for storing the negative mold 4 obtained by the impression material 1 and a closed container 5 are stored. A tooth with a packaging material 6 for shipping as a tooth, a cleaning tool 7 containing a cleaning agent for cleaning the surface of the tooth, and an instruction manual 8 in which the procedure for collecting an impression and the procedure for sending the impression are described. The pattern acquisition kit 10 is constructed. [Selection diagram] Fig. 1【課題】身元確認等の個体識別に有効な情報を、より簡易かつより効率的に取得することができ、より多くの情報を収集することを可能とする。【解決手段】動的粘弾性測定により求まる３７℃におけるｔａｎδ３７が０．５以下、８０℃におけるｔａｎδ８０が０．１以上で、かつＪＩＳ Ｋ ７２１５：１９８６に準拠してタイプＡデュロメータにより測定された硬さＨＤＡが６０以上の樹脂材を有し、歯の唇側の表面の紋様を含む歯の陰型を取得する印象材１である。また、この印象材１と、殺菌消毒剤や消臭剤等の溶液５ａが収容されており印象材１により得られた陰型４を保管するための密閉容器５と、密閉容器５を収容して発送するための梱包材６と、歯の表面を清浄するための清浄剤を含む清浄具７と、印象の採取の手順や送付手順等が記載された使用方法説明書８とを備えた歯の紋様取得キット１０を構成する。【選択図】図１
