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一步摄影胶片是利用DTR(DiffusionTransfer Reversal)原理获得影象。最初由美国波拉公司兰德博士发明。从1948～1977年,波拉公司垄断一步摄影国际市场30年。1976年以后,美国柯达公司彩色一步摄影胶片PR-10体系问世,并开始与波拉公司竞争。
One-step photographic film is the use of DTR (DiffusionTransferReversal) principle to obtain the image. Initially invented by the United States Bora company Dr. Rand. From 1948 to 1977, Polla monopolized the international market for one-step photography for 30 years. After 1976, the United States Kodak Company color one-step photographic film PR-10 system came out and began to compete with the Bola company.