| 摘要 |
FIELD: physics. ^ SUBSTANCE: retro-reflecting item has flat area and convex areas, comprising base and retro-reflecting film, rear surface of which is attached to face surface of base. Retro-reflecting film comprises prismatic layer, having retro-reflecting prismatic elements shaped at rear surface of the layer, and has extendibility equal to at least 20%. At the same time base has coefficient of optical transmission for visible light of less than 30% and/or a layer of film arranged behind prismatic layer has coefficient of optical transmission for visible light of less than 30%. ^ EFFECT: film may be adjusted for application onto bases that are further exposed to operations of deformation in cold condition, such as stamping, pressing of relief or pressing. ^ 19 cl, 8 dwg |
