| 21. | For a tile colorer and sealer, try Grout Colorant, sold in tile stores.
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| 22. | Tin oxide is valued in glazes as both an opacifier and as a white colorant.
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| 23. | Calcium chlorate is occasionally used in pyrotechnics, as an oxidizer and pink flame colorant.
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| 24. | It is used as a yellow colorant.
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| 25. | Uranium is used as a colorant in uranium glass, producing lemon yellow to green colors.
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| 26. | A colorant can act as either a pigment or a dye depending on the vehicle involved.
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| 27. | The main colorant of madder was discovered by Robiquet and Colin in 1827 and called alizarin.
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| 28. | Indigo carmine, or indigo, is an indigo derivative which is also used as a colorant.
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| 29. | The inks involved are usually water-based and use either pigments or dyes as the colorant.
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| 30. | The location of a leak can be visually identified more easily if the water contains a colorant.
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