PROBLEM TO BE SOLVED: To provide an irregular reflection sheet which irradiates shaded portions of a cultivated plant with light to reflect the light irregularly, promotes growth and coloration of leaves and/or fruits, has both of properties of irregularly reflecting light for inhibiting harmful insects and/or disease caused on the shaded portions of the leaves and/or the fruits, and ventilating properties for preventing bad effect because of getting sultry, and also on many projecting top parts of one surface or both surfaces of which net-like members are bonded so as to dry fish put on a grid in high efficiency.SOLUTION: The irregular reflection sheet is produced by: making many through-holes each having a diameter of 0.1-5 millimeters at 4-8 millimeter intervals on the entire surface of a light-reflecting thin plate-like member and forming projections and recessions each having a height of 0.1-4 millimeters at a space of 0.1-4 millimeters between the projections and recessions on the entire surface of the plate-like member so as to integrally project on both of the surfaces to form crease patterns in both surface directions. The surface area of the plate-like member where the crease patterns are formed is 0.7-0.8 times the surface area before forming the crease patterns.COPYRIGHT: (C)2012,JPO&INPIT【課題】 本発明は、栽培植物の日影部位に光を乱反射照射し、葉や果実の発育促進と着色促進し、葉の日影部位や果実の日影部位に生じる害虫や病気の抑制をする光乱反射性と、蒸れによる障害防止の通風性の両方の特性を有し、また、乱反射シートの片面または両面の、多数の凸頂上部に網形状部材を接着し、網に乗せた魚を高効率で乾燥させる、乱反射シートを提供する。【手段】 光を反射する薄い板形状部材の全部の面に、0.1ミリメートル~5ミリメートル径の透孔を4ミリメートル~8ミリメートル間隙で多数設け、当該板形状部材の全部の面に、高さが0.1ミリメートル~4ミリメートルで、凸と凸の間隙が0.1ミリメートル~4ミリメートルの凹凸を、両面に一体的に突出させて両面方向に皴模様を形成し、前記皴模様を形成した前記板形状部材の表面積が前記皴模様の形成前の表面積の0.7倍~0.8倍である。以上よりなる乱反射シーである。【選択図】 図1
