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pressure washer pressure

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Old June 26th, 2007 Jun 26, 2007 7:17:24 AM -   #1 (permalink)
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Default pressure washer pressure

I've heard that a "low psi" pressure washer is best for creating stencils, and I was wondering if there is a recommended psi for the process.

The pressure washers at my local hardware store seem to go from 1200-1800 psi.
 
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Old June 26th, 2007 Jun 26, 2007 9:58:16 AM -   #2 (permalink)
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Default Re: pressure washer pressure

That's about right. Mines a 1600 psi. Works great.
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Old June 29th, 2007 Jun 29, 2007 6:15:09 PM -   #3 (permalink)
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Default Re: pressure washer pressure

I bought a small Karcher from Walmart for about 89.00. I'm not sure what the PSI is but it works great for stencils and reclaiming screens...
 
 
Old May 18th, 2009 May 18, 2009 7:02:51 AM -   #4 (permalink)
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Default Re: pressure washer pressure

Pressure washers are great, but extremely high pressure is not necessarily the best. Too much pressure can actually blow the emulsion off the exposed screen. When using a pressure washer try not to focus on specific spots of the exposed screen, go all around it.
Don't over wash-out your exposed screen, this can actually cause the emulsion to start to wash out from spots that don't need to be washed out.
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Old May 24th, 2009 May 24, 2009 7:18:25 PM -   #5 (permalink)
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Default Re: pressure washer pressure

I have a separate hose for washing out the stencil.
 
Old May 31st, 2009 May 31, 2009 9:12:30 AM -   #6 (permalink)
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Default Re: pressure washer pressure

The idea is great I used my garden power waszeh for that and the methode is very good. I dont know whether the power washer can still be used in the garden, but I'm very plaesed with the effects.
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Old May 31st, 2009 May 31, 2009 9:47:12 AM -   #7 (permalink)
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Default Re: pressure washer pressure

I have a little 1600psi unit I picked up from Lowes for $98 that works perfect.
 
Old May 31st, 2009 May 31, 2009 11:42:31 AM -   #8 (permalink)
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Default Re: pressure washer pressure

I got one at a hardware store for $78 (1200 PSI); pressure washers are great to have, and it really gets the job done quickly and accurately. You just have to be sure not to over-wash your screens, and most importantly make sure to keep a safe distance between you and the said screen (about 2-4 feet). Otherwise you can lose detail, and/or blow off some of the emulsion off of the exposed screens.
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Old May 31st, 2009 May 31, 2009 1:42:28 PM -   #9 (permalink)
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Default Re: pressure washer pressure

i suggust not using a pressure washer to wash out the stencil
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Old May 31st, 2009 May 31, 2009 7:19:41 PM -   #10 (permalink)
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Default Re: pressure washer pressure

Why not?
It is prety much standard?
 
Old May 31st, 2009 May 31, 2009 9:29:13 PM -   #11 (permalink)
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Default Re: pressure washer pressure

The difference between a pressure washer working well or not is the spray pattern. Don't use a pressure washer that has a tight, stream pattern at close distances, period. It will blow your stencil out. However, you may get good results washing out stencils by keeping it 10-12" away.

Many Karchers have a tip that rotates in a circular pattern, and does not pinpoint, it works well for washing out screens, or you can get close (2-3") and blast out emulsion.
 
Old May 31st, 2009 May 31, 2009 9:42:31 PM -   #12 (permalink)
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Default Re: pressure washer pressure

Quote:
Originally Posted by AdVanceNetworks
Why not?
It is prety much standard?
Pressure washers are not standard for washing out stencils. If you need to use one for stencils then you are probably overexposing. a pressure washer is meant to reclaim screens not necessarily for stencils. all you need is a spray nozzle on a water hose.
 
Old May 31st, 2009 May 31, 2009 9:53:28 PM -   #13 (permalink)
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Default Re: pressure washer pressure

Pressure washers work great for washing out stencils Gatonegro and Midwaste have good points find a good distance and wide spray pattern not focused. Ive washed out index dots of 144 resolution on 165 mesh with great results and no blowout, also I wet the inside give it a soft rub in with my hand then flip it wet the back let it set a few seconds and pressure wash out. It's kind of a feel like pulling squeeges you get better at it with a little practice and maybe a sacrificed stencil or two
 
Old June 1st, 2009 Jun 1, 2009 5:44:27 AM -   #14 (permalink)
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Default Re: pressure washer pressure

Ditto Manicprints! First wet the screen on both sides, let it sit for a minute or two and simply wash out from a safe distance. If you get a good exposure time you won't have to wash your stencil out for more than a minute and change.
A great way to washout fussy details on the stencil is with a spray bottle filled with warm water. Just hold the screen up to some kind of backlight (in a light safe environment of course), take the spray bottle and hit the little details with the water.

Exposure times are key wether you're washing out with a pressure washer and/or a spray nozzle. If you over or under expose you'll have a hard time washing out with either tool.

I recommend using a pressure washer; you don't need the most powerful one, 1200 is just fine. This tool will also be very useful to you in getting other tasks done in your shop, such as: reclaiming, de-greasing, and general cleaning related chores.
In a nut-shell, its very useful and its doesn't hurt o have one around, it will speed things up.
Hope this helps.
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Old June 1st, 2009 Jun 1, 2009 7:45:20 AM -   #15 (permalink)
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Default Re: pressure washer pressure

Not saying it doesnt work, but it is not necessary.
 






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