The quality of watercolor is not the best, as they don't have much pigment.
But to nuance or small details it is useful.

It is easy to use.
With a cotton swab or brush soaked in water, I was able to easily create a light gradient. I'm glad I bought it.

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20 Colors Metal Watercolor Painting Set, 2024 New Portable Painting Floral Smudge Boxed, Pearl Gloss Solid Color Watercolor Handmade Solid Color Paint Painting 0.03oz