Hendrich V, Widmer K H, Ficker E
Unfallchirurgie. 1984 Dec;10(6):278-81. doi: 10.1007/BF02586010.
Concerning the calibration of the Prescale foil - a pressure sensitive foil, which shows a monochromatic, pressure depending coloration when loaded - some interesting new facts were ascertained. The coloration of the foil does not depend on the pressure load only, but also on the material of the pressing bodies. Calibration using hard material (high Elastic-Module, e.g. steel) results in a lower maximal optical density compared to soft material (low Elastic-Module, e.g. a hydraulic system) at the same pressure level. Due to wellknown facts of the pressure conditioned in a joint, a hydraulic system is more equivalent to joint conditions. Therefore, a calibration method based on a hydraulic system should be preferred if the Prescale foil is used in biomechanics. Furthermore, the density of coloration depends on the speed of pressure increase, too. A faster load of a particular pressure results in a denser coloration. Pressure increase during calibration shall be the same as during investigation. Both effects are statistically significant.
关于预压箔（一种压敏箔，加载时会呈现与压力相关的单色显色）的校准，已确定了一些有趣的新事实。箔的显色不仅取决于压力负载，还取决于施压体的材料。在相同压力水平下，使用硬质材料（高弹性模量，如钢）进行校准与使用软质材料（低弹性模量，如液压系统）相比，最大光学密度较低。由于关节中压力状况的已知事实，液压系统更符合关节状况。因此，如果在生物力学中使用预压箔，应优先选择基于液压系统的校准方法。此外，显色密度也取决于压力增加的速度。特定压力下更快的加载会导致显色更浓。校准期间的压力增加应与研究期间相同。这两种效应在统计学上均具有显著性。
