[toast0]

> if the turmeric is ground before sale i doubt there's any reason to use lead chromate.

If the roots are wholesaled to the grinder, and the grinder doesn't know that bright means poisoned, they might prefer brighter looking roots. The ground tumeric will be poisoned.

Similarly, if the roots are poisoned and discriminating buyers aren't buying then because they're too bright, you can still grind it and sell it, and the color will blend.