Q
how to make photo emulsion
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
To create a photo emulsion at home is a simple yet delicate process mostly used in screen printing. Begin with a diazo photo emulsion kit, available at most art supply stores, which includes the emulsion and sensitizer. First, in a dark room or under a safelight, mix the sensitizer with the emulsion thoroughly according to the product instructions, usually until the mixture turns a consistent color. This process makes the emulsion sensitive to UV light. Next, spread the emulsion evenly over the screen mesh with a scoop coater, ensuring a thin, uniform layer. Allow the coated screen to dry in a dark, dust-free environment. Once dry, expose the screen to UV light (a process called 'burning') with your printed transparency film placed on top, which hardens the emulsion not covered by the design, thus transferring the image onto the screen. Rinse the screen with water, and the emulsion where the design was remains soluble and washes out, leaving the stencil behind. Always remember to work in low light conditions until the screen is fully developed and use the emulsion as efficiently as possible since it has a limited shelf life once mixed.
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