实验表明，用重铬酸盐明胶（ＤＣＧ）记录的体全息图可水洗擦除后再显影。对高曝光量及多次曝光记录的全息图，采用适当的再显影工序，可改善全息图的图像质量。 Experiments have shown that volume holograms recorded with dichromated gelatin (DCG) can be washed and then developed. For holograms recorded at high exposures and multiple exposures, the image quality of the hologram can be improved using an appropriate redevelopment process.