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Other suitable aniline dyes may
be used to achieve colored stripes on white flowers.
Place flowers over a basin of
water which contains a very small amount of ammonia in a bell
glass. The petals will usually change. For example, many violet-colored
petals will change to green; red colors will become green, white
will turn yellow and dark carmine will turn black.
Violet-colored asters can be
moistened with a very mild solution of nitric acid. The ray florets
will turn red and will also acquire a pleasant scent.
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