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How to Choose a Material for Your CNC Project? Acrylic, Plywood and HDF Compared

Acrylic, plywood or HDF? CNC material comparison by price, durability and aesthetics. A practical guide from a CNC workshop in Szczecin, Poland.

One of the most frequent questions we get from customers: "What material should I choose for my project?" The answer depends on many factors — the intended use of the part, budget, operating conditions and the expected visual effect. In this article we compare three of the most popular materials: acrylic (plexiglass), plywood and HDF board.

Acrylic — When to Choose Plastic

Advantages

  • Excellent transparency, or a wide choice of colours and effects (opal, mirror, satin)
  • UV resistance — does not yellow in sunlight
  • Aesthetically clean, smooth edges after milling and polishing
  • Hygiene — easy to clean, does not absorb moisture

Disadvantages

  • Higher cost than wood for larger formats
  • More brittle for thin-walled details
  • Requires special cutters and precise parameters

Choose acrylic when:

You are making signs, 3D letters, backlit elements, display decorations or parts that require transparency.


Plywood — When to Choose Wood

Advantages

  • Natural grain aesthetics
  • Light but very strong structurally
  • Inexpensive relative to visual effect
  • Easy to post-process — sanding, lacquering, painting

Disadvantages

  • Reacts to moisture — needs water protection
  • Thickness can vary across a sheet (±0.3 mm)
  • Edges require finishing treatment

Choose plywood when:

You are designing furniture, interior decorations, scale models, toys, artistic objects or constructions where low weight matters.


HDF — When Precision and Smoothness Count

Advantages

  • Perfect surface smoothness — no visible wood structure
  • Uniform thickness, tighter tolerances than plywood
  • Excellent for templates, fillers, furniture backs
  • Low cost

Disadvantages

  • High mass for thicker panels
  • Poorer moisture resistance than plywood
  • Not suitable for structural load-bearing elements

Choose HDF when:

You need a flat, smooth surface for engraving, templates or furniture backing panels.


Comparison Table

FeatureAcrylicPlywoodHDF
Price$$$$$$
AestheticsModernNaturalNeutral
UV resistance
Thickness tolerance±0.1 mm±0.3 mm±0.1 mm
Finishing treatmentPolishingSanding/LacquerSanding/Paint
Outdoor useOnly treated

Not sure which material to choose? Describe your project to us — we will help you select the optimal solution and prepare a quote within 24 hours.

Frequently asked questions

Which material to choose for outdoor CNC signs?+
For outdoor use Dibond (aluminium composite) or UV-resistant acrylic are best. Plywood requires impregnation and is not suitable outdoors without treatment.
Is acrylic or plywood cheaper?+
Plywood is cheaper per m², especially for large sheets. Acrylic costs more but offers transparency or gloss effects that wood cannot achieve.
What dimensional tolerance does CNC milling achieve in Szczecin?+
For acrylic and HDF we achieve ±0.1 mm tolerance. Plywood as a natural material has variable thickness of ±0.3 mm, which we account for during programming.
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