Hard Coat Processes

The performance and durability of ophthalmic lenses starts with leading scratch resistance technology. Satisloh offers thermal dip coating and UV spin coating processes for hard scratch-resistance and highest anti-reflective adhesion on ophthalmic lenses.

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Excellent performance and durability of ophthalmic lenses starts with applying a hard coat that offers exceptional scratch resistant protection. Satisloh has two options: thermal dip coating and UV spin coating. Both of these provide the highest level anti-reflective adhesion and scratch resistance on ophthalmic lenses.

  • UV Spin Coating - less complex production and economical investment with the highest process speed. Can be fully automated and using solvent based, non-tintable chemistry, labs can achieve extremely high scratch-resistance.
  • Thermal Dip Coating - coats both sides of uncoated lenses and provides maximum scratch resistance and uniform performance on front and back. This is the most economical solution for high volume labs that can coat in batches.

Hard coat Processes

*substrate can be tinted prior to hard coating. ** volume dependent.
  UV Spin coating - All solids UV Spin coating - Solvent based Thermal Dip coating
Scratch resistance ⬤ ⬤ 〇 〇 〇 ⬤ ⬤ ⬤ 〇 〇 ⬤ ⬤ ⬤ ⬤ ⬤
Tintability ⬤ ⬤ ⬤ 〇 〇 ⬤ 〇 〇 〇 〇 〇 〇 〇 〇 〇*
Index match ⬤ 〇 〇 〇 〇 ⬤ 〇 〇 〇 〇 ⬤ ⬤ ⬤ ⬤ 〇
Cycle time 45-60 seconds 45-60 seconds 2-3 hours
Process type Single piece flow Single piece flow Batch
Lacquer cost $$ $$$ $-$$$$**
Investment (facility & equipment) $ $ $$$$

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