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screen printing => General Screen Printing => Topic started by: terryei on September 16, 2011, 09:54:53 AM

Title: emulsion for discharge?
Post by: terryei on September 16, 2011, 09:54:53 AM

We used the emulision for discharge printing.  Ulano QT Discharge.
Then we tried our regular emulsion, Ulano QLT and put on a Hardner.
The screens with the hardner held up a lot better.
Terry

Title: Re: emulsion for discharge?
Post by: tonypep on September 16, 2011, 10:02:59 AM

A hardener is pretty much necessary. If you're having difficulty reclaiming try the CCI 25WR and HardenerX. For long runs use the leftover emulsion as a full blockout and post expose X2 your normal exposure.

Title: Re: emulsion for discharge?
Post by: RICK STEFANICK on September 16, 2011, 11:29:21 AM

you will get the best results with any diazo based emulsion.  AND hardner

Title: Re: emulsion for discharge?
Post by: JBLUE on September 16, 2011, 11:36:07 AM

Quote from: tonypep on September 16, 2011, 10:02:59 AM

A hardener is pretty much necessary. If you're having difficulty reclaiming try the CCI 25WR and HardenerX. For long runs use the leftover emulsion as a full blockout and post expose X2 your normal exposure.

The Rep from CCI just dropped some of this off to me to try. Running a job on Monday with it. Cant wait.

Title: Re: emulsion for discharge?
Post by: ebscreen on September 16, 2011, 11:49:42 AM

For those that can't bear the exposure time of diazo,  CCI's ProChem TexCoat plus post hardener is the most water resistant photopolymer I've seen. Reclaims just fine, we use a dip tank though.

Title: Re: emulsion for discharge?
Post by: squeegee on September 16, 2011, 03:24:21 PM

We've done 2K+ pc discharge runs with our emulsion with no issues, IMS905 Nazdar's QTX with Ulano C10-D diazo, post exposed 2x-3x but no hardner.

Title: Re: emulsion for discharge?
Post by: RICK STEFANICK on September 16, 2011, 03:44:53 PM

photopolymer water resistant?  I honestly didnt think so.  news to me..

Title: Re: emulsion for discharge?
Post by: squeegee on September 16, 2011, 04:25:34 PM

Quote from: RStefanick on September 16, 2011, 03:44:53 PM

photopolymer water resistant?  I honestly didnt think so.  news to me..

Polycol One Coat and Aquasol HV/HVP are SBQ's that actually come with diazo if you want it.  I happened on this combo by accident, Nazdar/Ulano doesn't package it this way, but it works for me.