Technical Support Blog

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Reclaiming Powder

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Mixing instructions for reclaiming powder.

The OSI Reclaiming Powder is the most economical emulsion reclaiming chemical per gallon once mixed.  For the standard solution, mix 2 ounces of reclaiming powder with 1 gallon of water.  If you would like a stronger solution, try mixing 1 pound of the powder with 5 gallons of water.  This is great for tough-to-remove emulsion.

Emulsion Pinholes

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Emulsion pinholes.

If you are experiencing pinholes in your newly exposed screens, you should look into your degreasing process.  If there is anything left on your screen after the previous reclaiming process, you will experience pinholes, fish-eye, poor adhesion, and many other negative impacts.  Always use as much water as possible when degreasing to be sure all of the chemicals and grime are out of your screen.  Do keep in mind that pressure washers do not put out nearly as much water as it appears.  Other causes include a dirty exposure glass and dust where your screens are drying. 

Screen Chemicals

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Screens are difficult to reclaim.

If your emulsion is very difficult to reclaim (or even impossible) you may want to look at your exposure time along with the chemicals you are using to remove ink.  Harsh ink removers can harden some emulsions to the point that they will be very difficult to reclaim.  If you combine harsh ink removers with an under-exposed screen, it may never reclaim at all.  Screen Opener is a cleaner that you should not use very often.  If you are using it to clean ink out of an entire screen in situations such as color changes, reclaiming may always be difficult.  Some emulsions will resist this more than others.  If you find screen opener very quick to work with and you want to continue cleaning this way, call us for a more solvent resistant emulsion.  One more important note, if you spray emulsion reclaimer on your screen and let it dry before rinsing the emulsion out, it will lock the emulsion into the screen.

21 Step Sensitivity Guide

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Why is my emulsion slimy?

If your screen exhibits a slimy feel as you are rinsing out the image, your screen is most likely under-exposed.  In this situation, you are very likely to get screen breakdown while printing.  Also, when cleaning chemicals are used to remove ink or to open clogged mesh openings, a clear residue from the under-exposed emulsion may lock into the mesh.  This is difficult, if not impossible to reclaim.  Your best answer to this problem is to prevent it.  Try a Saatiprint 21 Step Sensitivity Guide.  It is a simple process.  Expose the screen at your “normal” exposure time, rinse out the image created by the guide, and count the number of squares remaining.  The guide will then give you a percentage to multiply your exposure seconds by to get your optimal exposure.