Bonded Ferrite is either injection or compression molded, and typically uses Nylon 6 or Nylon 12 when injection molded. Compression molded (which is very rare) is made by using epoxy mixed into the ferrite. Typically most bonded ferrite uses strontium ferrite. It costs slightly more than sintered ferrite because ferrite must be powderized and mixed with the appropriate material for carrying of the ferrite. The ferrite can be aligned in the mold which saves a secondary step. Note: bonded ferrite can also be calendared in sheets, rolls, & strips. Calendared material either uses CPE or Butyl Nitride. Additives: See Rubber Bonded Ferrite. Typical applications: sensors and encoders.