Author Topic: whats your favorite emulsion and what type of exposure unit you use  (Read 12692 times)

Offline sweetts

  • !!!
  • Gonzo Member
  • ******
  • Posts: 1768
  • Simplicity is the ultimate sophistication DUH
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #30 on: December 08, 2011, 08:22:14 PM »
black light 70 seconds, I am sorry is that the florescent black light bulbs?
RT Screen Designs
Willowick Ohio
www.rtscreendesigns.com


Offline jsheridan

  • !!!
  • Gonzo Member
  • ******
  • Posts: 2130
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #31 on: December 08, 2011, 09:51:25 PM »
am I the only one using ulano 925WR?

Lawson Expo Light 32 x 48 using high output (365n) unfiltered blacklight bulb x 12
Exposure is 6-8 minutes

Blacktop Graphics Screenprinting and Consulting Services

Offline Prosperi-Tees

  • !!!
  • Gonzo Member
  • ******
  • Posts: 4297
  • Common Sense - Get Some
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #32 on: December 08, 2011, 10:05:41 PM »
am I the only one using ulano 925WR?

Lawson Expo Light 32 x 48 using high output (365n) unfiltered blacklight bulb x 12
Exposure is 6-8 minutes
Just coated some screens today for the 1st time with Ulano 925WR. Ryonet X-Factor Vacumn Exposure unit 240 watts

Offline jsheridan

  • !!!
  • Gonzo Member
  • ******
  • Posts: 2130
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #33 on: December 09, 2011, 01:36:50 AM »
  It is my favorite because it reclaims easily even if under exposed. If your emulsion is giving you problems in the reclaim room you might want to find one that does not.


Or you may want to try exposing it properly.
Theirs no excuse for underexposure as it leads to an assortment of problems, one of them being difficult reclaim.
Blacktop Graphics Screenprinting and Consulting Services

Offline inkman996

  • !!!
  • Gonzo Member
  • ******
  • Posts: 3760
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #34 on: December 09, 2011, 08:02:09 AM »
  It is my favorite because it reclaims easily even if under exposed. If your emulsion is giving you problems in the reclaim room you might want to find one that does not.


Or you may want to try exposing it properly.
Theirs no excuse for underexposure as it leads to an assortment of problems, one of them being difficult reclaim.

He didn't say he was purposely underexposing he said in case of under exposure. But I am sure you knew that.
"No man is an island"

Offline Denis Kolar

  • Gonzo Member
  • ******
  • Posts: 2871
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #35 on: December 09, 2011, 08:10:30 AM »
Emulsion is ChromaBlue pure photopolymer and exposure unit is Nuarc 40-1K Mercury bulb 1000w.
It takes about 2 minutes per screen (I have never measured the time, it has light integrator. It might be a bit more or less than 2 min). No issues with washing out, decent detail, 2 year shelf life, blue in color (do not like the look of pinkish emulsions).
I have a bit of the emulsion left and I will be switching to ImageMate PC 701, it is almost the same emulsion (per people at Chromaline, they make it) with a slight faster exposure times and a better price at my supplier.

I measured the time needed to expose 155W and 230Y screens last nigh. 155W was 90 seconds and 230Y was around a 100 with my 1000W Mercury exposure unit and Chromablue. That should be slightly improved when I switch to PC701. 230Y had a halftone design with 50 lines/inch and 22.5 angle and washed out with no issues (no dots dropping off)

Offline Orion

  • !!!
  • Hero Member
  • *****
  • Posts: 764
  • Ain't no shortcuts in screen printing.
Re: whats your favorite emulsion and what type of exposure unit you use
« Reply #36 on: December 09, 2011, 09:55:03 AM »
  It is my favorite because it reclaims easily even if under exposed. If your emulsion is giving you problems in the reclaim room you might want to find one that does not.


Or you may want to try exposing it properly.
Theirs no excuse for underexposure as it leads to an assortment of problems, one of them being difficult reclaim.

He didn't say he was purposely underexposing he said in case of under exposure. But I am sure you knew that.

No need for me to under expose because of poor dmax values, we have a cts unit.
Dale Hoyal