screen printing > Newbie

Dip Tank

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thinkdesign:
For those of you that utilize a dip tank for emulsion removal. How often do you have to change chemicals and how do you dispose of the old chemicals? Any comments appreciated.

Thanks in advance

Joel

mk162:
about once every 6 months to 9 months.  You can get some neutralizer from either easiway or franmar and dump it down the drain.  The sludge at the bottom should be cured in the oven before disposal.  It's usually a sheet of old emulsion and ink.

SkylinePrints:

--- Quote from: mk162 on July 08, 2011, 06:32:56 AM ---about once every 6 months to 9 months.  You can get some neutralizer from either easiway or franmar and dump it down the drain.  The sludge at the bottom should be cured in the oven before disposal.  It's usually a sheet of old emulsion and ink.

--- End quote ---

yep

shellyky:
I think i went almost a year on my last one--youll know, when it starts to be a pain to remove with just the pressure washer and you end up scrubbing.    I let the water filter thru an old screen to get the little stuff before it goes down the drain also.

Northland:
I log the number of screens that go thru my tank.... and usually need to replace the solution at about 250 screens.
Since I never put an inked screen into my tank...  the old solution is drain safe.
I have a small tank (13 gallons), the drain is a couple inches above the bottom.
I drain the tank down to the drain level. Then, I pour the heavier liquid into a bucket and let the water evaporate so the solids can be put in the trash. Most of the time the solids would fit into a tall coffee cup.

My fresh solution is 1.5 gallons of Easiway 500 and about 11.5 gallons of water.
I estimate the cost at about $.25/screen.
http://www.easiway.com/products/easisolv-500-stencil-remover-concentrate-mixed-125

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