| The three major firms BASF, Bayer and Hoechst produced several hundred different dyes, along with the five smaller firms. |
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| Hoechst Celanese produces Certran polyethylene similar to Spectra, with about one half the modulus rating of Spectra. |
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| Sequential staining is critical as Pyronin Y can also bind DNA and the prestaining of DNA with Hoechst 33342 blocks this. |
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| Ethyleneglycol ester of montanic acid supplied by Hoechst Japan was used as a release agent. |
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| The polyester filament increase follows a 10 to 14 percent price increase on polyester staple in May, the third in a year, by DuPont, Wellman and Hoechst Celanese. |
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