You must now remove the printed part(s) from the print platform to prepare them for cleaning.

WEAR 100% nitrile gloves whenever handling uncured or partially cured print material.

CAUTION: Ensure that any tools you use in post-processing have been cleaned since their last use.

Put a nonabrasive cloth/lint-free paper towel underneath the print platform. Using the included punch tool, remove printed part from the print platform by pushing on it through the top side of the platform. Hold it the way you would a rubber stamp.
Remove any supporting architecture from the part by hand. →
Rinse the parts in IPA (isopropyl alcohol) or EtOH (ethanol) by hand, holding them over a container that can catch the solvent.

Special Considerations for Elastomeric Resins

If you are running elastomeric resins, such as ELAST-BLK 10, it may be difficult to remove parts from the print platform using only the punch tool. If this is the case, perform the following steps:

Use the punch tool as described in Step 1 above. This will get the part started in detaching from the platform.
Use the Platform Scraper to fully remove the part from the platform.
For instructions on removing the remaining, partially cured resin, see the section Clean Print Platform in the User Guide.

Printed parts must be cleaned with solvents to ensure safer handling, dimensional accuracy, and preparation for post-curing. This section will describe three methods that have been proven to work best for Figure 4 part cleaning: 1. Sonication in IPA; 2. Non-flammable Sonication; and, 3. Manual Cleaning.

Necessary Cleaning Materials Chart

WARNING: IPA IS A FLAMMABLE Liquid with flammable Vapors. KEEP AWAY FROM HEAT, SPARK AND OPEN FLAMES. USE WITH ADEQUATE VENTILATION. STORE AT 20-30ºC (68-86°F). DO NOT TAKE INTERNALLY. AVOID PROLONGED OR REPEATED BREATHING OF MIST OR VAPOR. liquid and vapor CAUSE IRRITATION TO EYES AND RESPIRATORY TRACT. liquid and vapor AFFECT CENTRAL NERVOUS SYSTEM. MAY BE HARMFUL IF ABSORBED THROUGH SKIN. MAY CAUSE IRRITATION TO SKIN.

CAUTION: Consult SDS for each solvent and material type prior to use for additional personal protective equipment.

CAUTION: solvents and solvent-related trash must be disposed of according to all government regulations.

always wear gloves when cleaning build parts.

After cleaning the part(s), it necessary to dry them of any solvent used in the cleaning step. This may be done in several ways, but a few recommended methods follow:

For all parts, be sure there is an absorbent cloth (disposable or otherwise) or container underneath the part to catch the solvent being cleaned off.

Shop air - if you have shop air in your facility that is not tied up with the printer's air connection, this would be the most-ideal way to air-dry the parts. This is not a replacement for air drying, but will speed up the process. Once finished using compressed air, let the part sit out for 30 minutes to air dry.
Air Compressor - If you do not have shop air, an air compressor would be the next-best solution. However, be aware that air compressors are fairly loud. This is not a replacement for air drying, but will speed up the process. Once finished using compressed air, let the part sit out for 30 minutes to air dry.	Air Compressor. This is for sample purposes only, and is not a recommendation or endorsement of any brand of air compressor.
Air Drying - Simply leave the part sitting on a paper towel for the time specified below. If a time is not specified for your resin, 60 minutes of air drying should be sufficient.
Oven Drying - You may also use a drying oven, such as the one pictured at the right.	Drying oven. This is for sample purposes only, and is not a recommendation or endorsement of any brand of drying oven.

Dry printed parts until you see no more liquid on their surfaces. For any drying method, please use the following guidelines:

1. Always dry printed parts over a tub, lab paper towel, or absorbent cloth. Do NOT dry the part over a sink or tub that drains to normal wastewater.
2. Discard any disposable towels used in the drying process according to all local, state and federal regulations. These towels have been in contact with uncured resin and solvents, and must be treated as such.
3. On a regular basis, have a professional cleaning service wash any absorbent cloths used in the drying process.
4. If you dry the part over a tub, periodically empty/clean it, discarding its contents according to all local, state, and federal regulations. The tub has been in contact with uncured resin and solvents and must be treated as such.
5. If using an air compressor in the same room (as opposed to shop air), wear ear protection when it is in use.
6. Always wear 100% nitrile gloves and safety glasses when handling partially cured printed parts. When drying with a high-pressure method, uncured resin or solvent may splash.
7. If you come into contact with uncured resin during part drying or at any time, wash the affected area with soap and COLD water. Any clothes contaminated with uncured resin or solvent must be dry cleaned promptly.
8. There might be remnants of supporting architecture left on your part(s). You can remove these supports by hand in the majority of cases. If you experience any issues removing supports, please see Troubleshooting item PCI4.
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Drying Time Quick Reference for Figure 4 Resins

No matter which method you use to dry your part, you must ensure it is completely dry before proceeding to the post-curing step. The chart below serves as a quick reference for suggested air-drying times.

CAUTION: Using compressed air is not a replacement for air drying. After drying with compressed air, you must still leave the part out for at least 30 minutes to completely dry.

Recommended Curing Units

3D Systems recommends one of two UV-curing units that have been tested to fully cure parts according to the curing times seen in the Resin Curing Chart. These curing units are:

• Figure 4 UV Curing Unit 350
• NextDent LC-3DPrint Box

Please see the Facility Requirements Guide for information on which curing unit might be best for you.

Instructions for Using the Figure 4 UV Curing Unit 350

To cure parts using this UV-curing unit, please see the machine's User Guide. Please see the Resin Curing Chart for proper curing times to use.

Instructions for Using the LC-3DPrint Box

To cure parts using this UV-curing unit, please see the machine's User Guide. Please see the Resin Curing Chart for proper curing times to use.

For Figure 4 MED-AMB 10 material, it may be necessary to sterilize cured, finished parts to be used in certain medical applications. You can sterilize printed parts by making use of an autoclave or using gamma-ray sterilization. Do not use a dishwasher or thermal disinfector. 3D Systems recommends the following autoclave method as a baseline starting point for sterilization:

1. Ensure printed parts are fully cleaned and cured before sterilizing them.
2. Place your part in a standard sterilization pouch.
3. Apply sterilization by placing the pouch containing the part in an autoclave for 15 minutes at 121°C or 3 minutes at 138°C. Make sure no mechanical forces are applied to the part during sterilization.
4. Let the part cool down to room temperature before using it. Make sure no mechanical forces are applied to the part during cool-down.

NOTE: The above protocol is a recommended starting point and may not be appropriate for all cases. Different geometries and use may require adjustment of this protocol to maximize effectiveness.

If using an autoclave for sterilization, you will notice that your part will change color with the sterilization process. This is normal. Please see the before/after images below for reference.

MED-AMB 10

Before sterilization	After sterilization

NOTE: Autoclave sterilization may impact the mechanical properties. Small drops in tensile strength, elongation at break, and impact strength may occur. Such changes are typically less than 20%. Use cases that are sensitive to that should be validated.

Figure 4 HI TEMP 300-AMB creates printed parts that can withstand high temperatures. However, exposure to different temperatures will change the material's color. A sample set of color changes is seen below:

Please see the Figure 4 Modular User Guide, in the section Clean Print Platform, for full platform-cleaning instructions.

There are two different techniques for cleaning the resin tray. Please see the following Figure 4 Modular User Guide sections to read about both techniques:

Clean Resin Tray After Normal Build

Running a Resin Tray Cleaning After a Failed Build

It is necessary to clean any tools you used during post-processing before their next use, even if you are continuing to use the same resin. Items to be cleaned include:

1. Punch Tool
2. Resin Mixer
3. Platform Scraper
4. Part-Cleaning Brush
5. Wire Brush
6. Your own tools

To clean any of these items, you can either soak them in IPA or place them into a beaker of IPA and put them in an ultrasonic cleaner. Ensure that they are completely dry before their next use, either by using compressed air or letting them air dry.