Just wondering what the proper steps are when using an exposure calculator. I have one ready to use. I'm just having a hard time to get my screens to wash out easily and I believe either my bulb is going out or I have the timer set on the wrong setting. If anyone could lend a helping hand and tell me how to use one of these that would be awesome!
How do I use an Exposure Calculator?
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Just pop in onto a screen and see what step it gives you.
You should be looking for a solid step 7. I believe that each step is a factor of 1.4 (root 2) difference. So if you have a solid step 5 you need to double your exposure.
You should be looking for a solid step 7. I believe that each step is a factor of 1.4 (root 2) difference. So if you have a solid step 5 you need to double your exposure.
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That's good advice for a Stouffer calculator, which is by far the easiest (and cheapest) to use, but there are other calculators that work differently. I've got a Chromaline one I spent $30 on, but prefer the Stouffer.
Check with the sheet that came with your emulsion for some general guidelines on a time based on the light source you're using, then place the calculator emulsion side up on your glass and the screen on top. For testing purposes you don't have to cover the whole screen with emulsion . . . just a small section large enough to cover the calculator. The calculator should come with instructions on how to read the image after processing and what adjustments in time to make to narrow down the time to get closer to the ideal time.
Check with the sheet that came with your emulsion for some general guidelines on a time based on the light source you're using, then place the calculator emulsion side up on your glass and the screen on top. For testing purposes you don't have to cover the whole screen with emulsion . . . just a small section large enough to cover the calculator. The calculator should come with instructions on how to read the image after processing and what adjustments in time to make to narrow down the time to get closer to the ideal time.
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