The Basics of Exposing Screens /// Using a DIY Exposure Unit for Screen Printing
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- Опубликовано: 15 июн 2024
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Free exposure calculator: www.anthemprintingsf.com/Scre...
This is the LED light I'm using in my exposure unit: www.amazon.com/QUANS-Blacklig...
I use a Riley Hopkins 150 4x1 screen printing press to print my shirts: screenprinting.com
I make my background music using a Teenage Engineering Pocket Operator mini synth/sequencer:
teenage.engineering/products/po 
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Your channel is a gem waiting for the masses to find.
Extremely valuable video right here, thank you.
I knew I recognized u from somewhere…🤟 I believe I bought your press… great videos man.. im following 🤙
haha, yup! hope that's working out for you!
the double you shot 🔥 I was like what ..!! LMAO!!
One other thing..... I checked the mesh count..... U R good 2 go. Lol.... That made me laugh so hard. Been many a time where I didn't check it!
Love the content!
Good content mate !Are 8x 18w blacklight tubes gonna work on a box with 20cm height ?
On my shop.... Home based. I just put up yellow bed sheets. Still lets light in but is UV safe. Anything yellow.... Corplast....yes I do signs also. Sheets . yellow paint. Great job on the exposure unit.
How'd the bed sheets get yellow? Is that anything like yellow snow?
Awesome! Thanks for the vid. Question, if my screen was under or over exposed do I need to reclaim the screen or can I just re add emulsion let it dry then back to the exposure unit?
You should reclaim the screen and start again. I wouldn't keep the old emulsion on there.
Hey Josh! Another great video! Did you take the glass off your UV light? I have one of those too in my DIY set up and my time is about 14 minutes...hoping that would cut down my time.
No, I'm using the light as it came. That may cut it down a little, but if it's the same light I would assume the difference might be from the type of emulsion, or maybe the distance between light and glass?
@@joshisterrific Okay, thank you for letting me know! I'm using the DIY method you mentioned in your video with the two legs and overhead arm. I'm about 13 inches away. I'm wondering if I should put a box over it to encase in the light. Thanks for the input--great job on the videos!
@@heatherjennings145 hmmm, I think mine is a little closer to the light. Either that, or the light isn't as bright. Could also be the type of glass. I tried to get the clearest glass I could find. You could try the box idea, but I feel it should still be lower than 14 mins even without that. You could also try adding more UV light to the mix to make it brighter.
@@joshisterrific Good call--can't wait to get out and screenprint--come on Spring!
How much wattage does the UV LIGHT need to be for this
New to this. What is the purpose of the registration marks?
They are there for when you are printing a multi color design. They help you align the separate screens together.
@@joshisterrific perfect thank you! What program do you use to design yours? I'll actually be doing 100+ shirts with two colors, this will save me time + money
@@hollywhite8538 I'm using Adobe Illustrator for my design needs. A cheaper alternative to that would be Affinity Designer.
Is that chromaline wr emulsion?? Great video
This one is Ecotex AP Blue.
@@joshisterrific I have the same emulsion but I am having trouble with exposure times. I keep getting blow outs during the washout process. I'm also having trouble removing air bubbles when I stir the emulsion. Any tips?
@@TheDIYWarrior my first guess is it's underexposed and that it needs a little more time with the light. I also have been told that a pre-soak and washing out the back side first helps with this. As for air bubbles - I've gotten some of those, and I try letting it settle naturally in the scoop coater or shake/tap it if I need to, but sometimes I just can't get them all and I try to just make sure the coat is as consistent as I can get it. I like the Ecotex emulsion okay, but I'm still trying out other kinds to find one I love.
@@joshisterrific Thanks for the advise. I'll definitely step up the exposure time (right now I'm at 1min). I'll try a minute and a half or so.
Can I use 4 tubelight of 14 watt each?
With tube lighting I believe you will need more wattage.
@@joshisterrific how many tubelights should I use then? Because in my area I can only find 14watt tubelights.
Underbase film what u mean? Why it shout me with more down mesh?
An underbase is a layer of white underneath the other colors in your design. Not everyone uses one, but it can help make the top colors brighter/more vibrant on dark colored garments. If you use an underbase then its typically done with a lower mesh than the top colors.
@@joshisterrific thank you so much!!! Did u know how much time we have to wait between applying the diffrent colors? And how much watts is the UV light good?
@LLLLLLL156 I would use a fash dryer in between colors, let it dry for about 10 seconds before moving to the next color. The exposure unit has 140 watts with the UV lights I used, a link to those should be in the description of that video.
@@joshisterrifici was asking abouth your DIY video where u make your own led exposior. I wanna make mine but cant find the Watts
@LLLLLLL156 yes, that diy exposure unit uses UV lights that are 140 watts across 8 light strips.