The microscopic structure looked like it was cooked, too, to make the pigment more durable and colorfast.

它的显微结构看起来也像煮过，使色素更持久且不褪色。

No problem, madam. But I think the red sweater not colorfast. Would you like to have it dry cleaned?

问题，女士。我想那件红色毛衣可能会掉色，您愿意干洗吗？

And you can see how this process generates very little runoff and produces a colorfast pigment without the use of any chemicals.

你可以看到这个过程如非常少的径流，并在不使用任化品的情况下出不褪色的颜料。