Epoxy adhesives typically have good infrared transparency and can provide strong bonding for various materials, including rocks.

One possible option for achieving infrared transparency in rock thin sections is to use an epoxy resin that is specifically designed for optical applications. Epoxy resins have been widely used in geological thin section preparation due to their excellent adhesive properties and ability to withstand polishing.

In order to ensure infrared transparency in the range of 1000 to 2000 nanometers, it is important to choose an epoxy resin that is specifically formulated for optical purposes. One such epoxy resin is the "Clearfuge" series from SPI Supplies. This epoxy resin is designed to be optically clear and has been used for various infrared applications, including thin section preparation.

When using an epoxy resin like Clearfuge, it is crucial to properly mix and apply the resin between the rock sample and the CaF2 substrate. Following the manufacturer's instructions for mixing ratios and curing times is important to achieve strong adhesion and uniformity. Additionally, it is advisable to choose a resin that has a low viscosity, which allows for easier penetration and filling of the thin section.

After the epoxy resin has cured, the thin section can undergo the polishing process. Using progressively finer abrasive materials, such as diamond paste or alumina powders, and following standard thin section polishing procedures, the epoxy resin should be able to withstand the polishing process without affecting its infrared transparency.

Remember to choose a reputable supplier and consult the technical specifications and instructions provided by the epoxy resin manufacturer to ensure proper usage and compatibility with the specific infrared range required for your application.