Cleaning Chart

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Depending on your requirements, choose which of the following three methods best suits your printing applications:

  1. Sonication in IPA - Recommended as a starting point for high-volume, robust cleaning systems. This uses 3D Systems' EZ Rinse C cleaning solvent and IPA or Propylene Carbonate from your local supplier. Due to the flammability of IPA, you must use an explosion-proof ultrasonic cleaner.
  2. Non-flammable Sonication - Recommended for ultrasonic users who cannot use IPA. This method is not as effective as method #1 above. Raising the bath temperature of the rinse solution and regularly changing the bath are ways to improve cleaning efficiency.
  3. Manual Cleaning - Recommended for those without access to ultrasonic equipment, but can use IPA. This method requires extra steps during washing and rinsing: 1. The part must be brushed with the included brush; and, 2. The part must be sprayed with compressed air. The operator must be careful handling parts which are still delicate at this stage.

Please use the chart below for the recommended cleaning times for each method.

Recommended solvents for material spills - For any of the solvents listed below as being used for a "Wash" cycle, you may also use that solvent to clean material spills.

Three Options For Cleaning

Choose ONE of the three options below for part-cleaning based on your needs. See further description of these methods listed above.

Material Type 1. Sonication in IPA 2. Non-flammable Sonication 3. Manual Cleaning


Wash Rinse Wash Rinse Wash Rinse
Figure 4 JCAST-GRN 10 n/a


do not exceed 3 min.

Propylene Carbonate

do not exceed 5 min.

5 wt% Elma Tec A4 Solution

do not exceed 5 min.


Clean IPA

do not exceed 3 min.


Dirty IPA

do not exceed 5 min.

Dirty IPA

do not exceed 5 min.


Dirty IPA

do not exceed 5 min.

Dirty IPA

do not exceed 5 min.

*For all materials, minimize ultrasonic power setting to less than 100W

Overview of Recommended Solvents

Solvent Chemical Abstracts Service # Specific Gravity @ 25°C (g/ml) Flash Point Boiling Point Recommended Form
IPA 67-63-0 0.785 12°C (53.6°F) 83°C use neat
EZ Rinse C 67784-80-9, 68919-53-9 0.88 > 218°C (> 424.4°F) > 301°C (573.8°F) use neat
Propylene Carbonate 108-32-7 1.20 116°C (240.8°F) 240°C (464°F) use neat
Elma Tec Clean A4 Mix 1.13 > 100°C (> 212°F) not applicable mix 5 wt% in water

When to Change Cleaning Solvents

You may change out the cleaning solvent in your containers whenever you feel that the solvent is not doing a good enough job stripping printed parts of uncured print material. However, you may also choose to have a hydrometer on-hand to measure the specific gravity of your solvent/print-material mixture. The table below shows what measurements will prompt which actions you can take.

Solvent Specific Gravity Values
IPA - Hydrometer range 0.700 - 0.810

Clean: do not change solvent < exceed 0.787

Dirty: use the solvent for "dirty" baths if between 0.787 - 0.797

Discard: Discard solvent according to all government regulations if > 0.797

EZ Rinse C - Hydrometer range 0.795 - 0.910

Clean: do not change solvent if < 0.886

Dirty: use the solvent for "dirty" baths if between 0.886 - 0.903

Discard: Discard solvent according to all government regulations if > 0.903

Propylene Carbonate - Hydrometer range 1.000 - 1.220

Clean: do not change solvent if > 1.197

Dirty: use the solvent for "dirty" baths if between 1.197> x > 1.190

Discard: Discard solvent according to all government regulations if < 1.190

NOTE: Use IPA ≥ 90% purity.

TIP: Using compressed air to clear small holes and features of EZ Rinse C prior to IPA cleaning improves ease of cleaning. Use soft brush to aid in cleaning if a ultrasonic cleaner is not available. The clean IPA that becomes saturated in the Rinse container should then be used for the Wash container until it is no longer effective at removing print material. After your Wash container's solvent becomes saturated, discard it according to all government regulations. Please see the table above for how often to change your solvent mixture.


WARNING: The federal OSHA requirement 29 CFR Part 1910.242(b) states: Compressed air shall not be used for cleaning purposes except where reduced to less than 30 psi and then only with effective chip guarding and personal protective equipment. For additional information, go to