作者: Robert P Arens
DOI:
关键词:
摘要: Re-usable sheet material, having a dark colored base provided on each side with microvoid layer, temporarily imageable by application of volatile liquids, is treated the face oleophobic (preferably also hydrophobic) fluorochemicals. Surface contamination oil, which would cause permanent transparentization and prevent re-use, readily removed placing material in contact back side. One use for product as an order blank fast food industry.