Exposure

Light Integrator

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Light IntegratorDo I need to use a light integrator to properly expose my screens?Your lamp output and the stencil material itself are constantly changing so you need to monitor stencil exposure if you want a stencil that reproduces the positive. Time alone is not accurate because: 1) Lamps age and UV output changes. 2) Stencils react - and stop reacting to UV light at different rates. 3) UV output changes as lamps warm up. 4) UV output changes if electricity input changes. 5) Stencil thickness and the color and size of the mesh inside the stencil effect exposure time. 6)...

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Stencil Exposure Testing

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Stencil Exposure Testing

Stencil Exposure Testing Ulano One-Step & Transmission Grayscale 1. Tape positive to the screen. You don’t need any special equipment to make an Exposure Step Test, just a coated screen, a typical positive with a variety of line thickness and some Ulano Rubylith™ masking film to block UV light. You are going to make 5 exposures by blocking portions of the positive as you expose it Ulano 1-Step Exposure Calculator Exposure calculators simulate 5 exposures at one time with a filter. The filters vary the amount of UV light that gets to the stencil in one exposure so you don't have...

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