The purpose is to provide an effective, efficient and easy way to apply a scratch resistant treatment to a CR39 in an in office environment. The ScratchGuard system does not require any expensive machinery and equipment. The OMS ScratchGuard system is one of the most durable and effective on the market. Its operation is safe for an office environment as there are no toxic fumes or solvents involved nor used. ScratchGuard will fill the CR39 lens pores with silicone. This will make the lens surface super slippery and objects will tend to slide off the surface instead of hooking on to it and scratching it.
SCRATCHGUARD should be stored in a Tupperware container with a snap on lid. Place lens into liquid at room temperature for a 15-minute time period. Remove lens and place into oven. Heat oven to 110 to 115 degrees C. (IMPORTANT: Do not wash lenses after soaking.) The lens can be placed on a square piece of cardboard so that the lens edges will not touch the metal grill of the shelf. Touching the hot metal grill could lead to tension in higher plus or minus lenses as well on high cylindrical lenses. Tension in that type of lenses could make them crack under heat. After 25 minutes under heat remove the lens and let cool off naturally to room temperature. When the lens has achieved this temperature the residue can be washed and cleaned off by any means, as hot water, Methanol or Acetone. The lens is now ready to be inserted into the frame. It can also be tinted now.
A laboratory oven or for small quantity users a normal kitchen toaster oven will do. No convection is needed in this case. All we need is heat to soften the lens so that it will open its pores so that the silicone can penetrate the lens pores.
One hundred and seventy-five pairs of lenses can easily be treated with one liter of SCRATCHGUARD. There is no shelf life to this product. THIS PRODUCT IS A WATER BASED SILICONE SOLUTION WHICH IS FRIENDLY TO THE ENVIRONMENT.
Use of Hydrophobic slick coats on regular lenses. By Chris Ryser, (Montreal July 11, 2010) Hydrophobic slick coats have been around since 1987 when I first introduced them at Vision Expo and the OLA exhibitions. They can be applied by evaporation of a pill under vacuum, from a liquid concentrate under vacuum, or by dipping the lens into a finished solution at room temperature. This solution contains no solvents is water based, emits no fumes, is totally safe and the process allows to do it with unprotected fingers. As the finished solution is a water based air cure material, very oxygen sensitive, there is no further action required, just dip and wipe, no baking or other process is needed. The base material is a Dow Corning polysiloxane, mixed with several surfactants by using water as the carrier. It provides, a super slick coating on the lens that is also an excellent scratch resistant treatment through its super slippery surface. This coating also has an excellent adherence to most surfaces as CR 39, Polycarbonate and High Index lenses and their hard coats. To provide an even better mechanical bond there is a product to etch the untreated surface microscopically. Lenses stay cleaner longer By adding anti-stat and ant-fog chemicals to the solution, dust will not be attracted to the lenses, they will stay cleaner longer, and any fogging up will dissipate within seconds. All other advantages you see on slick coated AR lenses can be applied to regular non AR coated lenses and achieve tneir full equivalent. These slick coats can easily be applied after the lenses have been edged so they will not turn and come off axis during edging process. A one Liter bottle will coat over 200 pairs of lenses during its shelf life. There are two products marketed by OMS Opto Chemicals for this purpose: Scratch Guard regular…………and Super Scratch Guard, (ant-stat and anti-fog)
Material
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How to Treat a Lens
Chemical
Nano Technology 