positive emulsion

简明释义

正性乳剂

英英释义

例句

1.When working with positive emulsion, it's important to maintain proper temperature.

在使用正乳剂时，保持适当的温度非常重要。

2.The artist used a positive emulsion to create stunning photographic prints.

艺术家使用了正乳剂来制作惊艳的照片印刷品。

3.In the lab, we learned how to develop film with positive emulsion for clearer images.

在实验室，我们学习了如何使用正乳剂冲洗胶卷以获得更清晰的图像。

4.The workshop focused on the techniques of applying positive emulsion in mixed media art.

工作坊专注于在混合媒体艺术中应用正乳剂的技巧。

5.The photographer recommended using positive emulsion for better color saturation.

摄影师建议使用正乳剂以获得更好的色彩饱和度。

作文

In the world of photography and printing, the term positive emulsion refers to a light-sensitive layer that is crucial in the process of creating images. This layer is typically made of a mixture of gelatin and silver halides, which react to light exposure. When a photographic plate or film is exposed to light, the areas that receive more light become darker after development, resulting in a positive image. Understanding the concept of positive emulsion is essential for anyone interested in traditional photography techniques, as it serves as the foundation for capturing and reproducing visual art.The process begins with the preparation of the emulsion itself. Photographers often coat glass plates or film strips with this emulsion, allowing it to dry before use. Once the emulsion is dry, it becomes sensitive to light. When a photograph is taken, the camera’s shutter opens, allowing light to hit the emulsion. The light interacts with the silver halides in the emulsion, causing a chemical reaction. This reaction is what makes the positive emulsion critical; it captures the essence of the scene being photographed.After exposure, the film or plate must undergo a developing process. This involves submerging the material in various chemical solutions that help reveal the image. The developer reduces the exposed silver halides to metallic silver, creating a visible image on the plate. The parts of the emulsion that were not exposed to light remain unchanged, which is why the final result shows a clear representation of the original scene. The importance of positive emulsion cannot be overstated, as it is this very layer that transforms a fleeting moment into a tangible photograph.In addition to traditional photography, the concept of positive emulsion extends into other fields such as printing and graphic arts. In these contexts, emulsions are used to create prints that can reproduce colors and details with precision. Artists and printers rely on the properties of positive emulsion to ensure that their work is accurately represented and can withstand the test of time.Moreover, with the advent of digital technology, the understanding of positive emulsion has evolved. While digital photography does not rely on physical emulsions in the same way, the principles of capturing light and creating images remain relevant. Digital sensors mimic the function of traditional emulsions by converting light into electronic signals, ultimately producing images that can be printed or displayed.In conclusion, the term positive emulsion encompasses a vital aspect of photography and printmaking. It represents the intersection of chemistry and art, where light-sensitive materials allow for the preservation of moments and creativity. For those who appreciate the intricacies of image-making, mastering the concept of positive emulsion is a step towards understanding the rich history and ongoing evolution of visual media. As technology continues to advance, the foundational principles behind positive emulsion remind us of the beauty and complexity inherent in capturing our world through images.

在摄影和印刷的世界中，术语positive emulsion指的是一种对光敏感的涂层，这在创建图像的过程中至关重要。该涂层通常由明胶和卤化银的混合物制成，这些物质在光照射下会发生反应。当摄影板或胶卷暴露在光线下时，受到更多光线的区域在显影后会变得更暗，从而形成正片图像。理解positive emulsion的概念对于任何对传统摄影技术感兴趣的人来说都是必不可少的，因为它是捕捉和再现视觉艺术的基础。这一过程始于乳剂本身的制备。摄影师通常将这种乳剂涂覆在玻璃板或胶卷上，待其干燥后再使用。一旦乳剂干燥，它就变得对光敏感。当拍摄照片时，照相机的快门打开，允许光线照射到乳剂上。光与乳剂中的卤化银相互作用，导致化学反应。这种反应使得positive emulsion至关重要；它捕捉了被拍摄场景的本质。曝光后，胶卷或板必须经过显影过程。这涉及将材料浸入各种化学溶液中，以帮助显现图像。显影剂将暴露的卤化银还原为金属银，从而在板上创建可见图像。未暴露于光线的乳剂部分保持不变，这就是最终结果清晰地显示出原始场景的原因。positive emulsion的重要性不容小觑，因为正是这一层将稍纵即逝的瞬间转化为有形的照片。除了传统摄影，positive emulsion的概念还扩展到印刷和图形艺术等其他领域。在这些背景下，乳剂用于创建能够精确再现颜色和细节的印刷品。艺术家和印刷商依赖于positive emulsion的特性，以确保他们的作品被准确表现并能经受时间的考验。此外，随着数字技术的出现，positive emulsion的理解也发生了变化。虽然数字摄影不以物理乳剂的方式运作，但捕捉光线和创建图像的原理仍然相关。数字传感器通过将光转换为电子信号来模拟传统乳剂的功能，最终生成可以打印或显示的图像。总之，术语positive emulsion涵盖了摄影和印刷的一个重要方面。它代表了化学与艺术的交汇点，在这里，光敏材料使得瞬间和创造力得以保存。对于那些欣赏图像制作复杂性的人来说，掌握positive emulsion的概念是理解视觉媒体丰富历史和持续演变的一步。随着技术的不断进步，positive emulsion背后的基础原则提醒我们，通过图像捕捉我们世界的美丽和复杂性。