| 11. | The dyes _ known as leuco dyes _ can turn green, violet or blue.
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| 12. | Exposure to ultraviolet radiation, solvents and high temperatures reduce the lifespan of leuco dyes.
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| 13. | The length of the segment above the threshold temperature for the leuco dye then becomes colored.
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| 14. | A leuco dye and a developer, when melted together, are enough to produce color.
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| 15. | Organic leuco dyes are available for temperature ranges between about and, in wide range of colors.
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| 16. | The Beck's envision using chemical dyes called leuco-crystal violet or leuco-malachite green.
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| 17. | The Beck's envision using chemical dyes called leuco-crystal violet or leuco-malachite green.
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| 18. | The rate of the deblocked leuco dye oxidation is dependent on the pH of the resin polymer matrix.
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| 19. | Bate-smith recommended in 1954 the use of the Forestal solvent for the isolation of leuco-anthocyanins.
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| 20. | Bate-smith recommended the use of the Forestal solvent for the isolation of leuco-anthocyanins in 1954.
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