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Is exposing a screen for 20 min excessive

1314 Views 5 Replies 6 Participants Last post by  sben763, 
T
I got a kit from silk screening supplies that included a exposure box.... I upgraded and got the 25 x 36 exposure unit with no lid. I used to have problems when I first got it... when washing out the image after exposing, a lot of emulsion would come off and ruin the screen. Found out it was due to under exposing it, so I kept increasing the time till i started getting good burns consistently. Only problem is I had to up the time to 20 min for each screen! It kind of sucks having to wait that long to burn a screen esp if theres 3-4 in a job. Does that seem excessive to anyone else?

I'm using pink dioz dual cure from silk screening supplies. I coat the shirt side of the screen twice.. then flip it over and coat the ink side once.

How long does everyone else expose with the same set up? Thanks.
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TYGERON
Getting everyone else's times even with the "same" set up probably won't help much. Too many possible extraneous variables.

Get a one step exposure calculator.

And buy the DVD series they sell or one comparable and watch it all they way through.

Makes the whole screen printing process less trial-and-error.
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ScreenFoo
It not seem as bad if you do other things while your screen is burning. :)
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Z
Same unit same emulsion and im about 12min.
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V
What wattage are you using? If your using 500 watts, you might want to invest in a 1,000 watt setup.
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sben763
vggraphics said:
What wattage are you using? If your using 500 watts, you might want to invest in a 1,000 watt setup.
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These units are more like 160w. They are florescent. The cci dual cure I was at 7.5 min on the unit. I use photopolymer now longest time is 3 min. I will caution anyone before switching. This took me a lot of Trial and error ok more on the error side to perfect.
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