Important Safety Information

The following are safety symbols that are common to 3D Systems guides. Some or all of these symbols may appear in this guide and/or in other Figure 4 Modular documentation.

CAUTION: Indicates the possibility of loss of data or damage to equipment.

WARNING: Indicates the possibility of injury or death to personnel.

ELECTRICAL SHOCK HAZARD: High voltage electricity is accessible in the vicinity of this sign or behind the access panel. High voltage can cause severe burns or death, as well as fires. Access panels are for service only and should be opened only by certified service personnel or trained maintenance personnel.


HARMFUL IRRITANT WARNING: Indicates that skin or eye irritation could result while exposed to a chemical composition

EYE PROTECTION: Indicates the need for eye protection.

WEAR GLOVES: Wear the appropriate gloves when required. For example, when touching surfaces that may contain or have been exposed to materials, wear nitrile gloves. Heat gloves are necessary when touching surfaces that may be hot to ensure burns don’t occur.

PINCH POINT: Indicates a pinch point hazard that could cause personal injury.


Personal Injury Warning: Failure to avoid the pneumatic tension arms may result in personal injury. Avoid the tension arm areas at all times.

HOT SURFACE HAZARD: A hot surface is accessible in the vicinity of this sign or behind the access panel. Avoid contact. Hot surfaces can cause burn injury or fire. Allow surface to cool before touching. Access panels are for service only and should be opened only by certified service personnel or trained maintenance personnel.

NOTE: A note signifies important information but not information of a critical content.

Safety Guidelines

You must be properly trained and have read this manual before operating the Figure 4 Modular system. Also, anyone assisting you must be properly trained. After you are trained, always follow the safety guidelines and procedures in the Figure 4 Modular User Guide before operating the Figure 4 Modular system.

The following design features are provided to reduce potentially hazardous operating conditions:

WARNING: If any of the following safety features fails, your actions may be all that will prevent potentially hazardous operating conditions.


  • Safety switches on the Figure 4 Modular process-chamber door, lower chamber door, and catch tray are intended to prevent accidental exposure of the user to the optical radiation.
  • The design of the projection-based radiation-delivery system is intended to prevent the optical radiation from being aimed outside the area of the process chamber.
  • The orange-acrylic door in front of the process chamber prevents operator exposure to optical radiation emission while observing operation.
  • The Figure 4 Modular system has been evaluated to IEC 62471 and the internal optical radiation source classified as ‘Risk Group 2’ and does not pose a hazard due to aversion response to bright light or thermal discomfort. Optical radiation is emitted from this product. Eye irritation may result from exposure. Use appropriate shielding.

First Aid and Protective Equipment

The following paragraphs provide general first-aid procedures and recommendations for protective equipment to minimize the risks from resin exposure. If professional medical attention is necessary, take the Safety Data Sheet (SDS) for the exact resin involved to the attending physician.

Skin Contact

Figure 4 resin may cause sensitization by skin contact. It is irritating to the skin; repeated and/or prolonged contact may cause dermatitis. Wear 100% nitrile gloves and lab coats to avoid skin contact. Should resin come in contact with skin, wash thoroughly with soap and COLD water and immediately remove contaminated clothing and shoes. If skin is irritated, get medical attention. Dry-clean contaminated clothing. Discard contaminated shoes and leather products.

Eye Contact

High vapor concentration may cause irritation. Safety goggles should be worn to prevent accidental splashes of resin into the eyes. If resin comes in contact with the eye, flush immediately with large amounts of COLD water for 15 minutes. Avoid sunlight, fluorescent light, and other ultraviolet light, and obtain immediate medical attention. Eye-wash facilities and a first-aid kit should be readily available and close to the resin.

Contact Lenses

If resin splashes into the eye when contact lenses are worn, flush the eye with water immediately. Verify that flushing has removed the contact lens from the eye. Protect eyes from light and obtain immediate medical attention. Discard contact lenses that come into contact with liquid resin.

Fume Inhalation

Inhaling fumes from resin is irritating to the respiratory system. High atmospheric concentrations may lead to irritation of the respiratory tract, dizziness, headache and anesthetic effects. Do not operate the Figure 4 Modular without its carbon filter in place. For most resins, normal operation of the Printer with filter in place should not emit fumes. If a person should inhale fumes, bring the exposed person to fresh air. Perform CPR if required. If breathing is difficult, give oxygen and obtain immediate medical attention for the person.


If a person ingests resin and the victim is unconscious or having convulsions, do not induce vomiting or give any substance by mouth. Immediately rinse the person's mouth and have him/her drink plenty of water. Get medical attention.

Resin Handling and Safety

Resin Characteristics

The photopolymers used in the resins may be hazardous if handled improperly. Repeated skin contact with resins may cause sensitization. Consult the manufacturer’s Safety Data Sheet (SDS) for information on specific resins. For further information on this and related topics, consult the 3D Systems Materials website.



Figure 4 Resin Storage

Resins should be stored in the opaque, non-reactive containers in which they were provided, according to the guidelines given in the SDS included with the resin, and according to all applicable government regulations. Protect resin from sunlight, ambient light, and moisture. Be sure your resin-storage area is dry, dark, and between 5°C-30°C (41°F-86°F). It is preferable to store the resin in a fireproof cabinet. Improperly stored resins may increase in viscosity, and may eventually result in a gelled, polymerized product in the storage container. Resins should be stored in conformance with applicable laws and regulations. The expiration date of the resin is written on its label. If resin is past its expiration date, the product is no longer guaranteed in terms of treatment. 3D Systems is not responsible for losses incurred as the result of improper storage of resin.

Resin Disposal

Do not dump resin down any drains. Dispose of resin according to the guidelines given in the SDS included with the resin and according to all government regulations. For more information on resin disposal, please see the section Considerations for Resin in the Facility Requirements Guide.

Resin Spill Containment

Improper operation of the machine may result in a major resin spill. Your company has the responsibility to define what constitutes a major spill. Clean up spilled resin as quickly as possible, as resin will cure under both natural and artificial lighting. Personnel who are involved in cleaning up major spills of resin should wear NIOSH/MSHA approved respirators designed for use with organic chemical vapors. In addition, each person should wear protective goggles, rubber boots, and 100% nitrile gloves to minimize exposure to resin, which can cause eye, skin, and respiratory irritation, as well as possible skin allergies and respiratory reactions.

WARNING: Untrained personnel should be evacuated from the area.

WARNING: Resins are flammable. Care should be taken during resin containment and clean-up operations.


A supply of dikes and control booms should be stocked so they are available to contain the affected area in the event of a major resin spill. The spilled resin should then be absorbed on inert, absorbent material and placed into drums for transfer to an approved waste-disposal site. After absorbing all spilled material, clean the spill location with an absorbent cloth and IPA or EtOH (isopropyl alcohol or ethanol). After cleaning up the spill, individuals should wash thoroughly with soap and COLD water. Any clothing touched by resin should be dry-cleaned before reuse. If resin has gotten onto your skin or clothes, avoid exposure to sunlight or other UV-light sources until skin and clothing have been cleaned of resin. Repeated or prolonged skin contact may cause sensitization. Vapor may be harmful.

Eliminate sources of ignition. Prevent entry into drains. Absorb spilled resin onto sand, earth or any other suitable, noncombustible absorbent material. DO NOT absorb onto sawdust or other combustible materials. Resin spills or uncontrolled discharges into wastewater systems must be reported to the appropriate regulatory body. Do not discard resin into drains/surface waters/groundwater. Maximize ventilation after accidental release.

Shelf Life

Resins are certified for use for at least 24 months from their date of manufacture. The expiration dates are marked on the material bottle labels. In general, resins are usable for several months after their expiration dates, provided that the materials have been properly stored, handled and not exposed to excess heat. However, use of very old material or material past its expiration date may shorten your in-service material life. Use of expired materials may also adversely affect the build quality of 3D prints. It is advisable to check the viscosity of any material past its expiration date prior to use.

In-Service Life

In-service life of the resin is defined as the useful life of the resin after having been pumped into the Figure 4 Modular machine's resin tray. The in-service life of resin greatly varies depending on resin type, usage and environmental conditions. The more volume built, the more new resin will be pumped from the resin bottle into the resin trays. This blends older resin with newer resin and extends the in-service life of the resins. If the resin is exposed to temperatures outside of the normal operating limits, is exposed to UV light, is exposed to particulates or vapors in the air such as dust or fumes, or if contaminates are introduced such as partially cured platforms from aborted print jobs being dipped into the resin tray, this will shorten the resin's in-service life. The types of patterns and builds performed also affect the in-service life of the resin. With all this taken into consideration, we would expect the in-service life of the resin to be the same as its expiration timeframe: two years. The resin retains its usefulness until a buildup of viscosity or a change in reactivity prevents further processing in the Figure 4 Modular Printer. All resins require some level of mixing to retain their properties, making it necessary to both premix the resin before use, and also to stir the resin in the resin tray with the Resin Mixer if left dormant for more than three hours. Follow the User Guide of the specific resin for complete instructions on getting the most use out of it.


Care should be taken when cleaning windows, panels, and other parts of the Figure 4 Modular Printer. Cleaning products that contain ammonia should not be used because they can contaminate the resin. Instead, follow the instructions in the section Cleaning the Printer to clean up spills. Accidental contamination of resins may change the material’s performance characteristics to such an extent that acceptable parts can no longer be reliably created.


Polymerization may occur upon heating the resin bottle. Signs of polymerization of stored resin include container bulging, leaking, the emission of heat, or an unusual odor from the container. If you notice any of these traits, do not use the material and dispose of it according to all government regulations.

WARNING: Sealed container may rupture if explosively hot. Please see the resin's sds for information on its flash point.