Coated Black foils and films | Acktar black coatings

Coated Black Foils & Films

Acktar Coatings are available not only by direct application to parts, but also as coated foil or film.

The coated foils enable the customer to benefit from Acktar coatings performance without sending the parts to Acktar.

This is an ideal solution for very large quantities, over-sized part areas and for contaminated environments where the light absorbing surface needs to be periodically renewed.

The black foil coating available either with or without an adhesive backing as sheets, die-cuts or roll.

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Application of Acktar Coated Black Foils and films

Light-Absorbing Foil coating – Overview and Selection Guide


Foil Type

Metal Velvet TM

Extra Diffusive

Lambertian Black TM

Ultra Diffusive

Maxi BlackTM

Diffusive Polyimide

Spectral BlackTM


Hexa BlackTM

Substrate Material Aluminum Stainless Steel Polyimide (Kapton) Aluminum Aluminum Honeycomb
KEY FEATURE Reflectance

~ 1%

High absorptance at

grazing angles

Thin Polyimide Semi specular finish Ultra-high absorptance

at grazing angles

Thickness 120μm 100μm 25/50/75μm 130μm 2mm
Appearance Diffusive Highly diffusive Diffusive Specular Diffusive 3D structure
AOI range 0 – 60° 0 – 80° 0 – 60° 0 – 45° 0 – 88°
Reflectance normal AOI < 1% < 1.5% < 2.5% < 2% < 1.5%
Abrasion Resistance Light Moderate to high Moderate Moderate Moderate plus
Cleanliness Class 10000 – ISO 7 Class 100 – ISO 5 Class 100 – ISO 5 Class 100 – ISO 5 Class 10000 – ISO 7
Self adhesive back Self adhesive back standard – available without adhesive

Service temperature

Without adhesive: long term (-)196°C to (+)350°C; short term up to (+)400°C  

(-)258°C to (+)250°C

With standard adhesive: long term (-)40°C to (+)121°C; short term up to (+)177°C
With low-outgassing: long term (-)50°C to (+)150°C; short term up to (+)260°C
Delivery Formats
Sheet 20×30 cm / 20×60 cm
Roll 20/30 cm width, any length
Adhesive Optional
Die-cut (pre-cut) Supplied as tight-tolerance cut to shape labels according to drawing
Certificates RoHS, REACH, ISO 9001:2015, AS9100
  Storage and Shelf Life
Storage conditions Indoors (temperature approx. 21°C; RH approx. 50%)
Standard shelf life For best performance, apply adhesive and remove protective film with 12 months


  • Shelf life standard – 12 month from Acktar shipment- extended shelf life available
  • A High Humidity proof (HP) is available in some formats
  • Adhesive option available: Standard or Low outgassing

Black foil operating temperature range

Product operating temperature – deg C
coated foil – no adhesive Long term -196℃ to +350℃, short term up to +400℃
coated foil with standard adhesive Long term -40℃ to +121℃, short term up to +177℃
coated foil with low outgassing adhesive Long term -50℃ to +150℃, short term up to +260℃
coated polymer Long term -50℃ to +150℃, short term up to +260℃

Die-Cut Black Labels

Black Coated foils and films may be supplied as tight-tolerance cut-to-shape labels to be applied by you in-house.

This is a simple, cost effective solution for parts that cannot be coated at our facility.

Key Features and Advantages

  • Conformal thin flexible foil
  • Appropriate for plastic and metal parts
  • High emissivity / low reflectance
  • Extremely low outgassing
  • No particulation
  • Vacuum, cryogenic, and clean room compatible
  • Cleanable

Patterned Parts

Typical Applications

  • Stray light absorption / suppression
  • Optical packaging
  • Laser devices
  • Infra red systems
  • Passive thermal control