FabDigitFabDigit

In-Mold Decoration (IMD)

Marking & decoration · Printing

In-mold decoration places a formed, printed decorative film in an injection mold so the graphic becomes part of the molded surface.

Injection moldingHigh cost $$$$Unchanged
Quote a part with IMDCompare marking & decoration
In-Mold Decoration (IMD) on a machined part

What is IMD?

It supports durable multicolour user interfaces, bezels, and automotive trim.

How it works

Artwork is reverse-printed on a clear carrier or decorative film, often followed by hard coat and optional vacuum-metallized layers. The film is registered, thermoformed when needed, trimmed, and loaded into the mold. Injected resin bonds to the back of the insert while the mold defines the visible surface. Because decoration and molding occur together, tool geometry, film draw, gate location, and resin compatibility must be developed as one system.

Why specify it

  • Protects reverse-printed graphics behind a clear film
  • Supports multicolour and photographic decoration in one insert
  • Combines molding and decoration in one production cycle
  • Provides repeatable registration at production volume

Where it falls short

  • High artwork, forming, trimming, and loading setup cost
  • Film can wrinkle, wash out, or delaminate near gates
  • Severe draw and compound curvature distort artwork
  • Design changes can require new print and forming tooling

IMD at a glance

IMD is strongest on cosmetic quality (92 of 100), at a high cost. It adds little lubricity. Corrosion protection and surface hardness are not rated: a plastic part does not corrode, and the finish leaves the part's own surface.

Corrosion protectionNot rated—
Surface hardnessNot rated—
Cosmetic qualityExcellent92 / 100
LubricityMinimal10 / 100
Relative costHigh65 / 100
CorrosionHardnessCosmeticLubricityEconomy

Each score is 0–100 against every finish in this catalog. Corrosion comes from salt-spray life (ASTM B117, log scale) and hardness from the finish layer's Vickers or pencil hardness; cosmetic, lubricity and cost are FabDigit's engineering assessment. Economy on the radar is the inverse of cost.

IMD key numbers

Typical values from the governing specifications and shop practice; bars are this finish against the highest value among marking & decoration finishes.

Thickness100–300 µm3.9–12 mil
Thickness
100–300 µm decorative carrier-film stack inherited from v1; this is insert thickness, not ink alone.
Electrical
Unchanged
Colours
  • full colour
  • metallic effects
  • transparent windows
  • custom graphics
Appearance
High-resolution gloss, matte, textured, metallic, or transparent graphics under a protective film.

Specifications for IMD

The documents a drawing cites to define this finish, with the Type / Class rows that apply. Each links to a page explaining the standard.

Drawing call-out

IN-MOLD DECORATION PER APPROVED ARTWORK FD-IMD-104 REV C, 0.20 MM PET FILM, REVERSE PRINTED, GLOSS 60–75 GU AT 60°, REGISTRATION ±0.30 MM

Which materials take IMD?

Verdict per material family, with the grades that behave differently. Each family links to its datasheets in the material library.

Material familyVerdictNotes
Polymer
YesDesigned for compatible injection-molded resin and film systems.
  • Resin melt temperature and shrinkage must match the insert system
Aluminum
NoIMD is an injection-mould polymer process.
Brass
NoIMD is an injection-mould polymer process.
Copper Alloy
NoIMD is an injection-mould polymer process.
Magnesium Alloy
NoIMD is an injection-mould polymer process.
Stainless Steel
NoIMD is an injection-mould polymer process.
Steel
NoIMD is an injection-mould polymer process.
Titanium
NoIMD is an injection-mould polymer process.
Zinc Alloy
NoIMD is an injection-mould polymer process.

How IMD is applied, and what it does to the part

  1. 1Print decorative film
  2. 2Apply hard coat if required
  3. 3Thermoform film
  4. 4Trim insert
  5. 5Register insert in mold
  6. 6Injection mold backing resin
  7. 7Inspect registration and adhesion
DimensionsTool steel and cavity geometry must account for the film stack; do not add IMD to an existing mold without reviewing fit and flow.
Build-up per side100–300 µm — The insert occupies part of the molded surface stack and must be included in tool design.
MaskingRarely needed. No post-mold masking is typical, but the insert must exclude gates, vents, seals, and bonding zones.
ElectricalUnchanged
AppearanceHigh-resolution gloss, matte, textured, metallic, or transparent graphics under a protective film.
Added lead time15–30 working days on top of the bare part

Design rules for IMD

What to decide on the drawing before the part goes to the finisher.

  1. Provide draft-free film seating and capture zones as agreed with the molder.The insert must remain registered while the mold closes and fills.
  2. Keep critical artwork away from gates and high-shear flow paths.Melt flow can wash out ink or move the insert.
  3. Compensate artwork for thermoforming distortion.Film draw changes line width and image location.
  4. Use generous radii through formed transitions.Sharp corners thin, whiten, or split film.
  5. Freeze resin, film, ink, and adhesive as one qualified stack.Changing one material can cause delamination.

IMD versus the alternatives

Finishes engineers weigh against IMD, and when each wins.

FinishCorrosionHardnessCosmeticCostThicknessChoose it when
IMD
this page
——92$$$$100–300 µm—
In-Mold Labeling (IML)
IMD vs In-Mold Labeling (IML) →
——88$$$50–150 µmfor label-like graphics on containers
Hot Stamping
IMD vs Hot Stamping →
0—88$$10–20 µmfor a simpler metallic accent
CorrosionHardnessCosmeticLubricityEconomy
IMDIn-Mold Labeling (IML)

The radar overlays IMD with In-Mold Labeling (IML), its most common alternative — chosen for label-like graphics on containers. Scores in the table are 0–100 across every finish in the catalog.

Cost, lead time and compliance

Relative cost

In-Mold Decoration (IMD) is a high-cost finish ($$$$): more expensive than about 73 % of the finishes FabDigit quotes.

Finishing is priced per part with a lot minimum, from FabDigit's own China-side rates. The exact figure appears on the instant quote once the part is uploaded.

Lead time and compliance

Added lead time15–30 working days
RoHSCompliant
NotesRequire declarations for film, inks, hard coat, adhesive layers, and any metallization.

What IMD is used for

  • Automotive control panels
  • Appliance interfaces
  • Consumer-electronics bezels
  • Backlit key panels
  • Decorative trim

IMD — frequently asked

Hot stamping vs IMD: which is more durable?

IMD can protect reverse-printed artwork behind a 100–300 µm film, while hot stamping leaves a roughly 10–20 µm transferred foil at the surface. IMD is generally better for broad, multicolour wear areas; hot stamping is simpler for a small accent.

What is the difference between IMD and IML?

Both place printed material in the mold, but IMD commonly describes decorative films that may be formed and can cover an interface or trim surface. IML more often uses a pre-cut label that becomes the container or part surface.

Can IMD be used on curved plastic parts?

Yes, if the film is thermoformed and the artwork is compensated for draw. Deep compound curves need prototype forming trials because local film thickness and registration can change by more than the drawing tolerance.

How thick is an IMD film?

This catalog uses the v1 range of 100–300 µm for the decorative film stack. The production drawing should state the actual film and nominal thickness selected with the molder.

What causes IMD film delamination?

Common causes include incompatible resin and ink layers, contamination, inadequate bonding temperature, and film movement during fill. Qualification must use the final resin-film-ink stack and molded geometry.