http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html Thu, 24 Jul 2008 03:03:16 +0000 http://wordpress.org/?v=2.5 http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-10524 Phil Sun, 06 Jan 2008 10:05:49 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-10524 Using the Diazo photo emulsion, I took a cue from the instructions that came with the kit and picked up a BBA 250 watt photoflood. I exposed a 10x14" screen for ten minutes with the bulb twelve inches away. The image washed out almost perfectly, save for a couple of segments of some very thin lines. I'm assuming I could have exposed it slightly longer. In any case, I picked up the the photoflood for less than ten dollars at a camera shop. Seems to do the job nicely. Using the Diazo photo emulsion, I took a cue from the instructions that came with the kit and picked up a BBA 250 watt photoflood. I exposed a 10×14″ screen for ten minutes with the bulb twelve inches away. The image washed out almost perfectly, save for a couple of segments of some very thin lines. I’m assuming I could have exposed it slightly longer. In any case, I picked up the the photoflood for less than ten dollars at a camera shop. Seems to do the job nicely.

]]> http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-8830 Rob Wed, 22 Aug 2007 11:08:20 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-8830 Sunlight is usable, BUT unpredictable. The times you used today, may not work later. There are too many variables such as season, air polution, clouds, time of day, etc. The time needed at noon, may be less than what is needed at 6pm. Just be prepared for some screens that don't turn out as well as you would have liked. Sunlight is usable, BUT unpredictable. The times you used today, may not work later. There are too many variables such as season, air polution, clouds, time of day, etc. The time needed at noon, may be less than what is needed at 6pm. Just be prepared for some screens that don’t turn out as well as you would have liked.

]]> http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-8824 Ken Wed, 22 Aug 2007 00:24:08 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-8824 I just did my first screen with Speeball's Diazo kit. I used direct sunlight (no haze, clouds, etc.) for about 50 seconds. It was slightly underexposed because the wind moved my positive (plexi I had was larger than the screen) but I had my timer set for 60 seconds. I think 60 would have been a little better. Anyway, it worked! I have a screen drying as I type this. I will be cutting a piece of plexi for the frame I have and make a backboard with black felt that will fit it as well, then I can fix everything in place next time. I just did my first screen with Speeball’s Diazo kit. I used direct sunlight (no haze, clouds, etc.) for about 50 seconds. It was slightly underexposed because the wind moved my positive (plexi I had was larger than the screen) but I had my timer set for 60 seconds. I think 60 would have been a little better. Anyway, it worked! I have a screen drying as I type this. I will be cutting a piece of plexi for the frame I have and make a backboard with black felt that will fit it as well, then I can fix everything in place next time.

]]> http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-7244 The Printers Blog » Photo emulsion exposure time? Tue, 19 Jun 2007 18:43:53 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-7244 [...] not sure… suggest doing test patches at same distance, like 3 feet away for two minutes, ten minutes,… http://www.screen-printing-t-shirts.com/… says…Screen size, bulb height, exposure time 8×10, 12 inches, 45 minutes 10×14, 12 inches, 45 minutes 12×18, 15 inches, 74 minutes 16×20, 17 inches, 92 minutes = 1&1/2hrs 18×20, 17 inches, 92 minutes [...] […] not sure… suggest doing test patches at same distance, like 3 feet away for two minutes, ten minutes,… http://www.screen-printing-t-shirts.com/…; says…Screen size, bulb height, exposure time 8×10, 12 inches, 45 minutes 10×14, 12 inches, 45 minutes 12×18, 15 inches, 74 minutes 16×20, 17 inches, 92 minutes = 1&1/2hrs 18×20, 17 inches, 92 minutes […]

]]> http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-6281 Rob Tue, 15 May 2007 02:47:41 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-6281 I use Diazo Photo Emulsion by Speedball. I buy it in the larger 26.2 ounce jars. But there are less expensive smaller-sized jars available. Between coating screens, I store it in the refridgerator. I use Diazo Photo Emulsion by Speedball. I buy it in the larger 26.2 ounce jars. But there are less expensive smaller-sized jars available. Between coating screens, I store it in the refridgerator.

]]> http://www.screen-printing-t-shirts.com/screen-printing-exposure-time-for-photo-emulsion-coated-screens.html#comment-6279 Marissa Tue, 15 May 2007 00:40:51 +0000 http://www.screen-printing-t-shirts.com/exposure-time.html#comment-6279 What kind of emulsion are you using? Do you have a favorite brand that is most effective with your light and timiing? What kind of emulsion are you using? Do you have a favorite brand that is most effective with your light and timiing?

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