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正片

正片(英語:Positive Film)為底片的分类标准之一,胶片功能類似相紙,利用负片冲印得到正像顯影,但不像负片和反转片是攝影膠片;由於以反转冲洗法(Reversal Process)的反转片(Reversal film)亦採正像顯影方式[1][2],「正片」遂成与负片相对的感光材料總稱,可供影片拷貝幻灯机及灯箱观赏等用途上,也可印制照片、印刷制版。

反轉片

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富士軟片利用正片負沖加雙重曝光的效果
加上膠框的幻燈片

彩色反轉片往往在字尾标示「CHROME」[3]。色彩饱满,真实,但曝光宽容度小(往往只有4、5EV,负片则能达到9EV甚至更多)的特点,对摄影人是种考验,因为细微的曝光差别就能在胶片上体现出来,得在较短时间内掌握曝光要领。

正片负冲

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反轉片一般需要经过2次冲洗,先负冲,再反转,即E-6沖印處理。正片负冲就是负冲后“跳过”反转环节,直接印制照片,亦即应该使用E-6冲印的正片却采用了负片的C-41沖印處理 。负冲的正片,色彩艳丽,色调夸张,呈现独特风格。這種正片負沖或負片正沖的手法稱之為「交叉沖洗」(Cross Processing)。

常见产品

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幻燈片

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應用反轉片方式製作的底片菲林)供幻燈機放映。常見的規格有135120兩種,顏色分彩色黑白

影片拷貝

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相關條目

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參考資料

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外部連結

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正片
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