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BOROFLOAT® 33 & Functional Coatings: A Union of Inspiration & Quality



Scratch/Dig Specifications


Scratch/Dig refers to cosmetic defects found in glass from the manufacturing and/or handling process. Abrisa Technologies’ standard metric for measuring such defects is based upon industry standards. The lower the ratio, the more stringent the specification.

  • 120/80 is considered commercial quality
  • 80/50 is a common acceptable cosmetic standard
  • 60/40 is acceptable for most scientific research applications
  • 40/20 laser quality
  • 20/10 optics precision

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Environmental Testing of AR Coatings (Abrasion & Salt Solubility)


Hot and Cold Mirror Solutions


Hot and cold mirrors “heat control filters” are types of dichroic filters used to remove unwanted energy from a light emitting source.
Hot Mirrors:
A hot mirror is a dichroic filter that reflects 90% of near infrared (NIR) and infrared (IR) light while transmitting up to 80% of the visible light. Hot mirrors transmit the shorter wavelengths and reflect the infrared energy.
Cold Mirrors:
A cold mirror is a dichroic filter that reflects up to 90% of the visible light spectrum while allowing transmission of infrared wavelengths IR and near IR of up to 80%. Cold mirrors reflect the shorter wavelengths and transmit the heat (infrared).
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Glass Strengthening


Abrisa Technologies can strengthen glass via two methods, Heat Tempering or Chemical Strengthening. Depending upon your application, one method will be preferred over the other.
Chemical Strengthening:
The Chemical Strengthening process toughens soda lime through a sodium and potassium ion exchange in a salt bath. Glass can be strengthened from 8 to 16 hours and is often requested for toughened thin display applications. Chemical strengthening is best suited for thin soda lime sheets (under 3mm) and applications where optical distortion must be kept to a minimum. Chemically strengthened glass does not “dice” like fully heat tempered glass when broken.
Heat Tempering:
Heat Tempering toughens soda lime through the controlled heating and cooling of the glass to maintain a temperature differential between the core and outer surfaces. The stressed induced compress the outer surfaces, forming a substrate substantially tougher than standard soda lime. When broken, tempered glass “dices” into many small pieces. This is typically referred to as “Safety Tempering” for it’s reduced likelihood of cutting a person in the event of a fracture.
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