| ... | ... | @@ -138,7 +138,9 @@ You need first to mix parts A and B in equal ratio to make the urethane. The man |
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You pour a certain mass $`M`$ of part B:
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If you want to color the urethane do it now! First, remember that the dye is called 'So Strong!' A little bit goes a long way. If you want to your grains to remain transparent to the eye, just add the smallest amount (1 drop is generally enough). If using color to simulate a color filter or monochromatic light, we recommend carefully measuring the volume of dye you use, and determining the correct dose by trial and error. 1 microliter per 16g of `Part B' will produce nearly transparent particles. 40 microliters of dye will ensure only very monochromatic light will be transmitted, but the particles will be very dark, nearly opaque to the eye. The "dark particles" depicted below were cast with these higher volumes of dye.
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If you want to color the urethane do it now! First, remember that the dye is called 'So Strong!' A little bit goes a long way. If you want to your grains to remain transparent to the eye, just add the smallest amount (1 drop is generally enough). If using color to simulate a color filter or monochromatic light, we recommend carefully measuring the volume of dye you use, and determining the correct dose by trial and error. Here are three sets of particles:
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The dark particles on the left were made with 40 microliters of blue dye per 16g of `Part B'. These transmit nearly monochromatic light, but the particles will be very dark, nearly opaque to the eye. The particles in the middle were made with 1 microliter of dye per 16g of `Part B', and are nearly as transparent as particles without dye, like those on the right, but with a light tint.
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| ... | ... | @@ -236,4 +238,3 @@ Or if you trap a bubble: |
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