Siraya Tech Rebound 55A Black TDS

1. Product Introduction

Key Features

Fast-Rebounding & Flexible – Designed for quick shape recovery and impact absorption.
55A Shore Hardness – Softer than Tenacious Flex, with excellent elasticity.
Broad Compatibility – Works with most 405nm LCD and DLP 3D printers.
Professional Black Finish – Ideal for both prototyping and functional parts.

Application:

Rebound 55A Black has a very high viscosity. Careful preparation is essential for success.

Resin Handling (Important!)	This resin contains no pigments that settle. Shaking is unnecessary and will only introduce air bubbles, which can negatively impact print quality.
Printer Compatibility	Compatible with most LCD and DLP printers (405nm) with a panel size less than 12 inches
Large Printers (>12 inches)	Due to the very high viscosity, printers larger than 12 inches may face challenges. Please consult Siraya Tech support before attempting prints on larger format machines.
High Viscosity Settings	Pay close attention to Lift Speed and Wait-After-Retraction (Light-Off Delay) settings in your slicer. Slower lift speeds and longer delays can allow the thick resin time to flow back under the build plate between layers.
Build Platform and Vat Preparation	Ensure the build platform is perfectly level and meticulously clean. Lightly sanding the build platform surface with fine-grit sandpaper can significantly improve first-layer adhesion. Clean the resin vat thoroughly, ensuring no cured resin debris is present.

Optimal Temp Range	Print in an environment between 25°C and 35°C (77°F - 95°F) .
Minimum Temperature	The absolute minimum printing temperature is 20°C (68°F). Printing below this may lead to failures.
Pre-warming Resin	Heat up the resin by using a hair dryer to warm up the resin in the vat before printing. We recommend a thin layer of resin for starting the print (follow the next step below).

1. Initial Pour	Pour only a small amount of resin into the vat – just enough to cover the estimated area of the first few layers. Pour slowly to minimize bubbles.
2. Spread Resin	Use a silicone spatula to gently spread the small amount of resin evenly across the FEP film in the expected printing area.
3. Settle Time	Allow the resin to settle for 5-10 minutes before starting the print to let any bubbles rise and dissipate.

4. Start Print & Monitor	Begin the print. Watch the build plate's initial descent.
5. Handle Sensor Warnings	On printers with leveling sensors, the plate might stop before full descent due to resin resistance, triggering a warning (e.g., "Platform uneven" or "Not Enough Resin"). If this occurs, bypass the warning and proceed with the print. The printer should still function correctly.
6. Add More Resin Gradually	Once the first layer begins printing successfully and the build plate is down, slowly add more resin into the vat, pouring near a corner away from the print area. Add only enough resin needed for the print height.
7. Monitor Initial Layers	Closely watch the first 5-10 layers to confirm successful adhesion to the build platform.

Draining	After printing, let the part drain thoroughly over the vat for at least 10 minutes.
Two-Stage Wash (Recommended)	Prepare 95% or higher concentrated Ethanol or IPA.
Bath 1	Wash the part for 10 minutes in a container of used/dirtier solvent (a standard wash station without ultrasonic is suitable). This removes the bulk of the resin.

Bath 2	Transfer the part to an ultrasonic cleaner containing fresh, clean solvent and wash for another 10 minutes.
Temperature	Ensure the cleaning solvent is not too cold, as this reduces effectiveness. Use IPA or Ethanol at room temp. Never heat flammable solvents.
Dry Immediately	Immediately after removing the part from the final cleaning bath, use compressed air or a hairdryer on a cool setting to blow off all residual solvent. This prepares the part for the essential heat treatment step.

This step is crucial for evaporating absorbed solvent and achieving final properties. Do this BEFORE Post-Curing.

Steps	Description
Heat	Place the cleaned and surface-dried part in a drying device (like a food dehydrator or a convection oven with good temperature control) Set to 50°C (122°F).
Duration	Heat the part for a minimum of 60 minutes. 90 minutes is recommended for optimal solvent evaporation.
Visual Cue	As the solvent evaporates during heating, you should observe the part's color transition from a slightly translucent black to a deeper, more opaque black.
Check Surface	After cooling, check the surface. If it still feels sticky, repeat the Cleaning and Heat Treatment processes.

Ensure the part is completely clean, dry, and has undergone the Heat Treatment step before post-curing.

Steps	Description
UV Source	Use a 395-405nm UV light source for curing
Curing Time	Cure for approximately 10-15 minutes. ARotating the part every 5 minutes to ensure even exposure on all surfaces.

1	Store Renound 55A resin in its original opaque bottle.
2	Place in a cool, dark, dry place, away from direct sunlight and heat sources. Recommended storage temperature is typically 15-25°C.
3	Keep the bottle tightly sealed when not in use.
4	Use within the recommended shelf life for best results.

PPE	Always wear nitrile gloves, safety glasses, and a suitable respirator when handling uncured resin.
Ventilation	Work in a well-ventilated area.
Skin Contact	Avoid skin contact. If contact occurs, wash immediately and thoroughly with soap and water.
Disposal	Dispose of uncured resin, contaminated solvent, and disposable materials according to local environmental regulations.