幻灯投影已广泛应用于生物教学。其制片方法在不断创新。笔者在教研实践中偶有一得,愿奉献给广大生物教师。蜡染法操作简单,即用毛笔蘸“修正液”(打字用),在投影片有胶膜一面绘图或写字,经片刻“修正液”干,接着甩另一支毛笔(或排笔)蘸透明水色全面平涂。待色彩渗入胶膜干燥后,用脱脂棉球擦去修正液笔迹。因“修正液”为蜡质,具疏水性,水色不浸润有修正液部 Slide projection has been widely used in biological teaching. Its production methods in constant innovation. The author in teaching and research practice occasionally, is willing to sacrifice to the majority of biological teachers. Batik method is simple, that is, with a brush dipped in “correction fluid” (typing), the film in the projection side of the drawing or writing film, after a moment “correction fluid” dry, and then rejection of another brush (or Pai T) dipped in transparent Aqua full flat coating. After the color infiltrates the film to dry, wipe the correction fluid handwriting with a cotton ball. Because of “correction fluid” is waxy, hydrophobic, water color is not infiltrated with correction fluid