screen printing > Waterbase and Discharge

Magnacolors White Discharge LO

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cclaud3:
Hello, a few months ago we decided to start buying our white discharge ink in 120k containers. Really, due to lack of 30k container availability at the time. We went through plenty of 30ks before this particular series and it did fine.

The issue is that now that we are half way through this container the white doesn't want to clear all the way. More pressure, fresh blades, multiple durometers tried, etc. First half was fine. All of the other bases and inks are behaving correctly-use the same activator as well. Ran a drywall mud stirrer a couple of weeks ago thinking it was maybe a chemical separation. Didn't really change anything. We keep the lid on with the original lid locking mechanism. It's only open for a minute or so at a time since nothing else is mixed with it.

Dried out? How to resolve? Ivan is no longer with Magna so I would be asking clueless sales reps. Just thought I'd ask.

ericheartsu:

--- Quote from: cclaud3 on April 13, 2022, 10:34:59 AM ---Hello, a few months ago we decided to start buying our white discharge ink in 120k containers. Really, due to lack of 30k container availability at the time. We went through plenty of 30ks before this particular series and it did fine.

The issue is that now that we are half way through this container the white doesn't want to clear all the way. More pressure, fresh blades, multiple durometers tried, etc. First half was fine. All of the other bases and inks are behaving correctly-use the same activator as well. Ran a drywall mud stirrer a couple of weeks ago thinking it was maybe a chemical separation. Didn't really change anything. We keep the lid on with the original lid locking mechanism. It's only open for a minute or so at a time since nothing else is mixed with it.

Dried out? How to resolve? Ivan is no longer with Magna so I would be asking clueless sales reps. Just thought I'd ask.

--- End quote ---

He works at GSG now. i think he is coming to visit us next week.

zanegun08:
Add a little fresh discharge base (clear discharge) to the batch to lower the viscosity. 

Also maybe try it in another screen to see if the screen could be the cuplrit, and not the ink itself.

Also could just add a little water as well but clear discharge base would likely not lower the performance as much as water.

I don't like how white discharge performs anymore, I just do white HSA now 3 screens to make it bling, yes it has hand, but it looks great.

Eric knows more than me though so maybe he'd say the above is bad ideas, I know Matsui used to have a thinner which was basically water with specific PH for refreshing water base inks, maybe Magna has something like that, but I'd first try a different screen, then discharge base, then water and see where that gets you for a quick fix.

cclaud3:

--- Quote from: ericheartsu on April 13, 2022, 12:09:07 PM ---
--- Quote from: cclaud3 on April 13, 2022, 10:34:59 AM ---Hello, a few months ago we decided to start buying our white discharge ink in 120k containers. Really, due to lack of 30k container availability at the time. We went through plenty of 30ks before this particular series and it did fine.

The issue is that now that we are half way through this container the white doesn't want to clear all the way. More pressure, fresh blades, multiple durometers tried, etc. First half was fine. All of the other bases and inks are behaving correctly-use the same activator as well. Ran a drywall mud stirrer a couple of weeks ago thinking it was maybe a chemical separation. Didn't really change anything. We keep the lid on with the original lid locking mechanism. It's only open for a minute or so at a time since nothing else is mixed with it.

Dried out? How to resolve? Ivan is no longer with Magna so I would be asking clueless sales reps. Just thought I'd ask.

--- End quote ---

He works at GSG now. i think he is coming to visit us next week.

--- End quote ---

Thanks for the info.

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