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screen printing => Equipment => Topic started by: Shanarchy on August 06, 2014, 04:27:09 PM
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Question about exposure times:
I use Ulano EZ Film capillary film
http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475 (http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475)
What should I expect for exposure time with a LED unit?
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Question about exposure times:
I use Ulano EZ Film capillary film
[url]http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475[/url] ([url]http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475[/url])
What should I expect for exposure time with a LED unit?
On the Starlight I would guess around 20 seconds.
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Question about exposure times:
I use Ulano EZ Film capillary film
[url]http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475[/url] ([url]http://www.sourceoneonline.com/item.asp?categoryID=4§ionID=27&subSectionID=134&subSection2ID=0&subSection3ID=0&attrCatID=0&attrIDs=0&catID=134&catTab=sub_section&productID=2475[/url])
What should I expect for exposure time with a LED unit?
We are doing a second round of testing as we speak.....I should have round two results tomorrow. Round one results were at 18.5 seconds. But I am not going to tell you that this is the final times.
I would rather not guess!
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Thank you very much Rich and Terry!
I know results vary depending on white or dyed mesh and waterproof/non-wp film, but this gives me a very good ballpark area of where I can expect to be.
An led unit is definitely on my wish list.
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For exposure times, one can't say that the times are going to be exactly the same for everyone that uses the same emulsion or carrier device with cap film like this one. I assume that they provide a variety of thicknesses.
There are other factors in play as well. For example, some manually coat 1:1 (on all mesh) while others coat different amounts of times for each different mesh size. A company can't say that their exposure times will be exactly X time because of the variables such as being hand coated, can be much different in emulsion thickness from one shop to the next. A 1:1 coated using the sharp edge will be different than a 1:1 coated with the round edge. Bob may hand coat faster and heavier than Sally.
Toss that in with those who coat a 110 mesh 1:1 and others do 1:2 and then some 2:2 and 2:3. All one can do is give a good approximate answer based on test and more accurately, would be to provide averages.
Capillary film or products like this kind mentioned will take out a variable of thickness assuming you are comparing the exact same mesh threads/% open area and emulsion thickness. I see they also suggest that this can be used with manual emulsion application as well.
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For exposure times, one can't say that the times are going to be exactly the same for everyone that uses the same emulsion or carrier device with cap film like this one. I assume that they provide a variety of thicknesses.
There are other factors in play as well. For example, some manually coat 1:1 (on all mesh) while others coat different amounts of times for each different mesh size. A company can't say that their exposure times will be exactly X time because of the variables such as being hand coated, can be much different in emulsion thickness from one shop to the next. A 1:1 coated using the sharp edge will be different than a 1:1 coated with the round edge. Bob may hand coat faster and heavier than Sally.
Toss that in with those who coat a 110 mesh 1:1 and others do 1:2 and then some 2:2 and 2:3. All one can do is give a good approximate answer based on test and more accurately, would be to provide averages.
Capillary film or products like this kind mentioned will take out a variable of thickness assuming you are comparing the exact same mesh threads/% open area and emulsion thickness. I see they also suggest that this can be used with manual emulsion application as well.
Agree to all of this. If we want to get really scientific with it, we need to know what mesh brand and color was used for testing, so we know how thick it is to begin with. Then telling the coating method in addition to an EOM value, and THEN how long it took to reach full exposure all the way through. And of course emulsion type.
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For exposure times, one can't say that the times are going to be exactly the same for everyone that uses the same emulsion or carrier device with cap film like this one. I assume that they provide a variety of thicknesses.
There are other factors in play as well. For example, some manually coat 1:1 (on all mesh) while others coat different amounts of times for each different mesh size. A company can't say that their exposure times will be exactly X time because of the variables such as being hand coated, can be much different in emulsion thickness from one shop to the next. A 1:1 coated using the sharp edge will be different than a 1:1 coated with the round edge. Bob may hand coat faster and heavier than Sally.
Toss that in with those who coat a 110 mesh 1:1 and others do 1:2 and then some 2:2 and 2:3. All one can do is give a good approximate answer based on test and more accurately, would be to provide averages.
Capillary film or products like this kind mentioned will take out a variable of thickness assuming you are comparing the exact same mesh threads/% open area and emulsion thickness. I see they also suggest that this can be used with manual emulsion application as well.
Agree to all of this. If we want to get really scientific with it, we need to know what mesh brand and color was used for testing, so we know how thick it is to begin with. Then telling the coating method in addition to an EOM value, and THEN how long it took to reach full exposure all the way through. And of course emulsion type.
Here at M&R we have tested literally hundreds of emulsions, thicknesses, various mesh counts and colors. We have the information available to our customers as needed. Lon Winters also was here for two weeks in the beginning of the project and he alone probably did over 500 different variations. As an independent he can vouch for the information.
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Here at M&R we have tested literally hundreds of emulsions, thicknesses, various mesh counts and colors. We have the information available to our customers as needed. Lon Winters also was here for two weeks in the beginning of the project and he alone probably did over 500 different variations. As an independent he can vouch for the information.
Rich you sound like the Jones 8)...Lon is a top dog read his articles all the time
darryl
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Just to compare numbers...
Starlight 2331
SP1400, 156 - white mesh, 2wet over 2wet, round edge scoop coater.
28% relative humidity in the drying room. screen dried for 24 hours. 82 degrees F.
I'm at 38 seconds for what seems to be a perfect burn.
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I will add the Vastex times for the version we tested, 13 sec on everything from 110-330. Aquasol HV, 2+1 with dull side. 25-30% humidity.
pierre
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Just to compare numbers...
Starlight 2331
SP1400, 156 - white mesh, 2wet over 2wet, round edge scoop coater.
28% relative humidity in the drying room. screen dried for 24 hours. 82 degrees F.
I'm at 38 seconds for what seems to be a perfect burn.
Cant believe you just posted this, I am doing this exact test tomorrow, you just saved me some time. Does that hold up to discharge?
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Also, I don't have glass, guess I will be quicker.
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I've got glass... would think you'll save some seconds off....
we don't do a lot of long run discharge...
but I can say that it held up just fine to 500 pcs last week with Rutland White Plus....
-- and the screen was still nice and strong when cleaning it off after the print run.
so I have no doubt that it would have held up longer if needed.
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I've got glass... would think you'll save some seconds off....
we don't do a lot of long run discharge...
but I can say that it held up just fine to 500 pcs last week with Rutland White Plus....
-- and the screen was still nice and strong when cleaning it off after the print run.
so I have no doubt that it would have held up longer if needed.
awesome news, thanks for that.
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I've got glass... would think you'll save some seconds off....
we don't do a lot of long run discharge...
but I can say that it held up just fine to 500 pcs last week with Rutland White Plus....
-- and the screen was still nice and strong when cleaning it off after the print run.
so I have no doubt that it would have held up longer if needed.
with or without hardener?
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no hardener... haven't ever used the stuff.
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even better news.