Contaflex GM3


The GM3 range of materials is particularly suited to fast machining in high volumes. That’s because GM3 is a terpolymer, based on high-purity glycerol methacrylate. Resultant lenses are durable, resilient to protein build-up and can be used for a variety of wearing regimens. Contaflex GM3 is available in two water contents: 49% and 58%.

GM3 technical information

Material characteristics

PropertyContaflex GM3 49%Contaflex GM3 58%
Classification Filcon l 2Filcon ll 2
USANAcofilcon BAcofilcon A
Oxygen permeability (ISO) @ 35°C gas to gas (barrers)15.925.5
Swell factor @ 20°C1.291.38
Water content by refractometer @ 20°C50%59%
Refractive index @ 20°C dry1.5221.523
Refractive index @ 20°C hydrated1.4161.402
Light transmission (%) @ 380-780nm>94%>95%
Hardness (Shore D)8788

Please note: These are typical values. Always check the certificate of conformity supplied with the goods for the actual values of the batch.

Environment control

For best manufacturing conditions Contamac recommends 19-23°C with a relative humidity of 45%-60%.

Polishing

The recommended polishing compound is Contapol 2 with a spindle speed of 3,500rpm and weight of 240gms. With the above machining recommendations polishing should require a maximum of 30 seconds.

Hydration

Hydration of GM3 materials is best performed in buffered saline with a pH of 6.8-7.3.


Manufacturing Consumables

  • High melt blocking wax
  • High melt blocking beeswax 
  • Kemdent blocking Wax
  • Water soluble wax
  • Contapol 1 polishing compound
  • Contapol 2 polishing compound
  • Cotton polishing cloth 
  • Delrin polishing cup
  • Delrin polishing sponge
  • Roller sponges

Accessories

  • Tweezers
  • Hydratation baskets
  • Glass vials
  • Stoppers
  • Aluminium top seals
  • Flip tear up seals
  • Shrink-wrap sleeves
  • Double soft lens mailers
  • Net vial sleeves
  • DMV soft lens remover
  • Lens catch mat

 


Your Marketing Permissions

Contamac will use the information you provide to share consented marketing efforts. Please let us know which marketing efforts you wish to receive from us:

You can change your mind at any time by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at comms@contamac.co.uk. We will treat your information with the highest level of respect. For more information about our privacy policy please visit our website. By clicking below, you agree that we may process your information in accordance with these terms.