OKP Materials and the ÅngströmLink (AL) Label

by: FOC FAQ

OPTICAL PLASTICS: Ask FOC Ask FOC

Published: July 13, 2015

, Last updated: September 18, 2025

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QUESTION: Is AL-6261 the same as OKP4?

ANSWER:

Yes. We re-label the OKP materials under the ÅngströmLink (AL) label, where the last two digits of the product name indicate the refractive index:

askfocchartokp

If you get a 25kg bag of any OKP product it will arrive in the original Osaka Gas packaging and you will see the original Japanese labeling on the bag. If you purchase a 5kg bag it will arrive in a sealed metalized bag (which I repackage myself for quality control purposes) and you will have to trust us. In this case we are happy to provide the original Osaka Gas lot number on the COC.

ADDITIONAL CONTENT & RESOURCES:

Category Resource: FOC Optical Plastics Page
Find More Information in this Blog: Why is high refractive index important?

Answered by AskFOC Technical Team July 13, 2015

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FOC FAQ Fiber Optic Center has a team of technical experts and marketing strategists with decades of years in the field. This team contributes to the fiber, cable and specialty industries coverage through news, alerts, reports and general media information.

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