3D printed figure

Viscosity, mechanical performance & safety

Rule of thumb: in photopolymer 3D printing, higher-viscosity resin systems can enable higher mechanical performance and improved handling safety—when the chemistry and process are designed correctly.

  • Many very low-viscosity resins are formulated with small, low-viscosity reactive diluents. These can lead to brittle “eggshell-like” prints (low toughness) and may increase handling risks if not managed with proper PPE and post-processing.

Monomer-free & monomer-based 3D resins

3Dresyns supplies both monomer-free and monomer-based 3D resins:

  • Monomer-free resins: ultra-safe formulations that do not contain monomers and can still flow well enough to print at room temperature on most SLA, DLP & LCD printers.
  • Monomer-based resins: selected formulations that maintain excellent printability and deliver strong performance because we use carefully selected high-performing monomers (including bio-based options when possible) to protect both mechanical performance and safety.

Why choose High Viscosity (HV) resins?

Benefits that are difficult to achieve with very low-viscosity resins:

  • Higher toughness & durability: HV systems can support the design of ultra-tough, durable materials when formulated with the right building blocks.
  • Improved handling profile: HV resins are typically less prone to skin absorption than very low-viscosity, small-molecule systems (always use PPE and follow IFU).
  • Better results with temperature control: HV resins can be printed in most commercial printers at 25–50°C after adding a simple heater. A compact heating solution typically costs around €50–€60 and can be installed in minutes.

Extra advantages of printing at 25–50°C

  • Lower viscosity during printing: warming reduces resin viscosity and stickiness, which can decrease peel/separation forces and reduce the risk of print failure, especially for tough, high-viscosity materials.

Need help selecting the best setup for your application? Discover our consulting services for choosing the right printer and post-processing configuration.

Tooling / clamp image

Print at room temperature or with heating (25–50°C)

Do you want maximum simplicity (room temperature) or maximum performance (temperature control)?

Our 3Dresyns can be printed in both scenarios:

  • Low-cost printers (typically €200–€2,000) can be used with our resins and are ideal for short to medium production runs.
  • LV versions (Low Viscosity): print at room temperature on most SLA, DLP & LCD printers without modifications.
  • HV versions (High Viscosity): for higher mechanical performance, add a simple heater and print at ~25–40°C (up to 50°C depending on printer & setup).
  • During ordering , you can choose LV or HV versions for selected resin families.
  • LV versions already deliver excellent mechanical properties (often beyond typical market benchmarks).
  • HV versions deliver even higher mechanical performance when printed with temperature control.
  • Both versions are designed to be ultra-safe, VOC-free, and targeted for high performance applications.

Affordable heating options

Ready-to-use heating systems are commonly available for around €60, for example: Chitu Systems Mini Heater . Alternatively, you can combine a small heater + temperature controller for < €50.

  • Heater (example): a compact fan heater can rapidly warm many printer enclosures to ~50°C or higher.
    Example 300 W heater (small footprint; placement depends on printer geometry and safety constraints).

Example heater


  • Temperature controller (example): keeps the printer chamber stable. The probe can be placed inside the enclosure (position depends on printer design) to maintain consistent resin temperature.
    Example temperature controller

Temperature controller example


Benefits of working with 3Dresyns

  • Safe, eco-friendly resin portfolio designed to be printable on most commercial printers. Explore our Engineering 3Dresyns with properties similar to (and in many cases better than) conventional engineering plastics: engineering materials .

Where printers are heading

  • The market is moving toward larger, affordable MLCD printers. Our resin technology is ready for scale.
  • Professional production also needs reliable heating and stable light output. Real light power can vary across the vat and decay over time depending on printer design, wavelength, optical path, and cumulative usage.
  • Lack of power monitoring and control is a major cause of variability and print frustration. Consistent manufacturing requires stable, non-variable printing conditions.
  • Our instructions help users quickly find optimum settings for the current state of a printer, but we sell resins—not printers—so long-term power stability depends on the printer hardware and maintenance.

Consulting services

  • Our consulting services can help you move beyond fragile, inconsistent “eggshell” prints and build a reliable, repeatable workflow.

3D printed bunny

Biocompatibility & food-contact applications

  • Biocompatible and food-contact applications require maximum control of printing, post-curing and post-processing to ensure safety. Only some printers can be properly calibrated and maintained to deliver stable light output over time.
  • We offer consulting to design printer setups and workflows for professional production with high quality, consistency and reproducibility, including with printers typically ranging from €500 to €10,000.
  • Resin families that often benefit from printing at 25–50°C: Engineering 3Dresyns .

Are you tired of printing fragile resins?

If you want help selecting the right resin (LV vs HV) or additives for your application, email us at: info@3dresyns.com