QUALITY INSPECTION DEVICE FOR CARDBOARD SHEET

To provide technique capable of keeping track of fluctuations in the coating film thickness of ink during printing and adjusting the coating film thickness by accordingly adjusting an amount of ink transfer and viscosity before printing becomes defective.SOLUTION: A cardboard sheet quality inspection device includes: imaging means 2 for imaging a printing surface of a cardboard sheet; illumination means 3 for illuminating an imaging surface by the imaging means 2; density information acquisition means 41a for acquiring printing density information from RGB levels of image information acquired by the imaging means 2; and determination means 41b for determining whether an amount of ink on the printing surface is proper or not on the basis of the printing density information acquired by the density information acquisition means.SELECTED DRAWING: Figure 1 【課題】印刷中にインキの塗膜厚の変動を把握でき、これにより印刷が不良になる前に、転移量や粘性を調整して塗膜厚を調整可能とする技術を提供せんとする。【解決手段】段ボールシートの印刷面を撮像する撮像手段２と、撮像手段２による撮像面を照明する照明手段３と、撮像手段２で得られる画像情報のＲＧＢレベルから印刷濃度情報を取得する濃度情報取得手段４１ａと、濃度情報取得手段により取得された印刷濃度情報に基づき、前記印刷面のインキ量の良否を判定する判定手段４１ｂとを備えた。【選択図】図１