AP (alumina pink):
This is a pink colored alumina oxide material (alumina pink): which is often in the range of 95 to 99.7% purity. This material is durable and has excellent wear resistance to most yarns. For certain items, this material can be offered with engineered surface finishes for optimal performance (see note on the Ceramic Finishes tab concerning surface finishes). Alumina oxide ceramics have been a successful material within the textile industry for decades, and are used in many ceramic designs.
AR (alumina red):
This is a reddish / maroon colored alumina oxide material, which can vary in purity from 80% to 97%. The material is 85% purity and is utilized for the ceramic component of the bearing roller guides.
AW (alumina white):
This is a white or off-white colored alumina oxide ceramic. Alumina ceramic is naturally colorless, so color may be added to differentiate the ceramic purity (as is the case with our ceramics), or for visual contrast to make it easier to see running yarn on a ceramic surface since the yarn is often white as well. Our products designated “AW” can vary from 90% to 99% purity. White alumina is offered for specific items as 92% purity or 99.7% purity.
This is a tan or yellowish brown colored titania ceramic (Titanium Dioxide). Titania was one of the earlier materials used as a yarn guide in the textile industry. This material can be well polished and can be more delicate to certain yarns than alumina, although it also tends to wear faster and fracture more easily than alumina due to its larger micro-crystal particulate size. Titania is not available in as many complex shapes as alumina ceramic, and is most often used for eyelets.
TC (titania conductive):
This is a dark gray or blue-gray titania ceramic material that has been fired with an additive to cause it to be electrically conductive. This is often used in applications with yarn where static build-up is a concern (for example, w/fiberglass yarn).
PCS (polycrystalline sapphire):
This is a material developed for specific applications requiring the highest purity alumina oxide ceramic available. This material is not frequently sold due to its cost, as the refining and firing of this ceramic must be done in a controlled environment. Only certain shapes and sizes of limited size can be achieved with this material, and due to this cost of this material only those guides which we regularly manufacturer can be offered.
Porcelain is a material which was historically used in the textile industry but has since been largely replaced by the use of titania and alumina ceramics. CTX USA no longer carries an active large inventory of yarn guides made from porcelain material. Porcelain guides are not polished, but have a glazed surface (glass coating). When this coating is worn through, the underlying base material porcelain is very abrasive. We do offer custom production with this material upon request however, order minimums and tooling apply.