GM Advance


GM Advance is an evolutionary advance on the physical and chemical properties of GMA-based soft lens materials. Its refined blend of purified monomers helps achieve high manufacturing yields, while its exceptional on-eye stability, water retention and durability guarantees patient satisfaction and low lens breakage levels.

  • Lower modulus, higher tensile strength and higher elongation-to-break than other GMA based materials
  • Unique material blends ensure superior lens surfaces and edges
  • More dimensionally-stable than other GMA-based and soft lens materials
  • Resists dehydration longer and rehydrates faster than comparable materials
  • Dehydration comparable to Polymacon, and better than VP/PMMA-based materials
  • Available in 49% and 58% water contents

 

GM Advance technical information

Material Characteristics

PropertyContaflex GM Advance 49%Contaflex GM Advance 58%
Classification Filcon l 2Filcon ll 2
USANAcofilcon BAcofilcon A
Oxygen permeability (ISO) @ 35°C gas to gas (barrers)1626
Swell factor @ 20°C1.281.36
Water content by refractometer @ 20°C50% 60%
Refractive index @ 20°C dry1.5151.515
Refractive index @ 20°C hydrated1.4171.400
Light transmission (%) @ 380-780nm>94%>94%
Hardness (Shore D)8683

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 3,500 rpm and weight of 240gms. With the above machining recommendations polishing should require a maximum of 30 seconds.

Hydration

Hydration of GM3 Advance 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

 


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