The Phrozen Aqua-Gray 4K 3D Resin is a high-performance photopolymer resin formulated for 4K LCD/MSLA printers. Its combination of low shrinkage, low viscosity and neutral grey tone makes it the go-to option for miniatures, sculptures and technical parts that demand maximum detail and dimensional stability.
Technical specifications
Parameter
Value
Color
Grey (Aqua-Gray)
Weight per bottle
1 kg
Viscosity
210–310 cps
Surface hardness
80 Shore D
Tensile strength (UTS)
24 MPa
Elongation at break (EAB)
13 %
Flexural modulus
43 MPa
Tensile modulus
1037 MPa
Izod impact resistance (notched)
41 KJ/m²
HDT @ 0.45 MPa
70 °C
Type
High definition / Standard
Compatible printing technology
LCD / MSLA (4K resolution)
What it is used for
The Phrozen Aqua-Gray 4K is designed for any application where precision and fine detail are critical. Its neutral grey tone makes it easy to visualise complex geometry and serves as a perfect base for painting or finishing the part.
Action figure, wargame and collectible miniatures
High-resolution facial sculptures and busts
Functional prototypes with tight tolerances
Jewellery and fashion parts for shape verification
Architectural models and detailed scale models
Parts for silicone or resin moulds as a master pattern
Master production for special effects and prop-making
How to use it
Shake the bottle well for 1–2 minutes before pouring the resin into the printer vat to ensure a homogeneous mixture.
Pour the required amount into the vat without exceeding the maximum level indicated by the printer manufacturer.
Set the printing parameters (exposure time per layer, base layers and lift speed) according to the profiles recommended by Phrozen for 4K printers.
Start the print and monitor the first layers to confirm adhesion to the build plate.
Once the part is finished, carefully remove it from the build plate using nitrile gloves.
Submerge or wash the part with 99.9% isopropyl alcohol to remove uncured resin. Agitate gently and replace the alcohol if it becomes heavily saturated.
Allow the part to air-dry until the alcohol has completely evaporated.
Cure the part under UV light (curing station or UV chamber) following the times recommended by Phrozen to achieve the final mechanical properties.
Sand, paint or apply the desired finish once the part is fully cured and dry.
Warning — Uncured photopolymer resin: Liquid resin is irritating to skin, eyes and mucous membranes. Always work with nitrile gloves, safety glasses and in a well-ventilated area. Avoid direct contact with uncured resin. Liquid waste (leftover resin, saturated washing alcohol) must not be poured down the drain; expose it to UV light until solidified and dispose of it as solid waste in accordance with local regulations.
Usage tips
Print profiles and exposure
Optimal exposure times depend on your printer's light source. For 4K resolution at a wavelength of 405 nm, start from Phrozen's official profiles and adjust in 0.5 s increments based on the required level of detail. Excessive exposure time causes overexposure and loss of detail in fine geometries; insufficient exposure results in weak layers and adhesion failures.
Resin storage and handling
Store the bottle in a cool, dark place away from UV light sources (ideal temperature: 15–25 °C). Once opened, close the cap tightly after each use. If the resin has been sitting in the vat without printing, stir or swirl it gently before resuming to prevent grey pigment sedimentation. Do not mix resins from different brands or formulations in the same vat.
Post-processing and finishing
The neutral grey tone of the Aqua-Gray 4K is ideal as a painting base: apply a primer before painting to improve colour adhesion. If you intend to use the part as a master pattern for silicone moulding, ensure UV curing is complete (uncured resin can inhibit the cure of platinum silicones). Sand with fine-grit sandpaper (400–800) between primer coats to eliminate layer lines and achieve a professional finish.
Frequently asked questions
Which printers is this resin compatible with?
The Phrozen Aqua-Gray 4K is compatible with any LCD/MSLA printer that works with 405 nm resins. It is especially optimised for 4K resolution printers. Check Phrozen's profile configurator to find the recommended exposure settings for your specific printer model.
What liquid is recommended for washing parts?
The most effective and safe wash is done with 99.9% isopropyl alcohol. Use two consecutive baths (one for rough cleaning and one for finishing) to completely remove uncured resin. Avoid water unless using a water-washable resin; for that purpose, Phrozen offers the Phrozen Water-Washable Model Gray 3D Resin.
Is post-curing printed parts necessary?
Yes. UV post-curing is essential for the part to reach its final mechanical properties (80 Shore D hardness, 24 MPa tensile strength, etc.). Without post-curing, the surface may remain tacky and structural properties will be below specification.
Can I use this resin as a master pattern for silicone moulds?
Yes, it is a common use. Make sure the part is fully UV-cured before pouring silicone, as uncured photopolymer resin can inhibit the cure of platinum (addition-cure) silicones. Apply a release agent if necessary and verify compatibility with a small test before making the final mould.
What is the difference between this resin and the 8K version?
The main difference lies in the resolution it is formulated for. The Aqua-Gray 4K is optimised for 4K printers, while the Phrozen Aqua-Gray 8K 3D Resin is designed for higher-resolution printers, allowing even finer details to be reproduced. If your printer is 4K, the 4K version delivers optimal results with the correct exposure profiles.
Can the part be painted once printed and cured?
Yes. The neutral grey tone of the Aqua-Gray 4K is specifically intended to facilitate painting. Apply a primer coat (preferably fine-grit spray primer) over the cured and sanded part before painting to improve adhesion and even out the surface. It accepts acrylic paints, enamels and oil paints.
What is the shelf life of the resin and how should I store it?
When stored correctly (cool, dark place, between 15–25 °C and tightly sealed), the resin has an approximate shelf life of 12 months from the manufacturing date. Avoid exposing it to direct sunlight or artificial 405 nm light sources outside the printer. If you notice lumps or the resin is partially gelled, do not use it.
Is there a version of this resin with greater detail or a different finish?
Yes. Phrozen offers several options depending on your needs: Aqua-Gray 8K for ultra-high resolution, Aqua Clear for transparent parts, ABS-Like Matte Gray for greater mechanical resistance and TR300 Gray for high-temperature applications.
Video tutorial
How to do the printing test for Sonic Mighty 4K - Phrozen LCD 3D Printer
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