【New, Unused】Mixed Color Ink Kit hue 6colors writing lab

I received this as a gift last year, but I haven't had a chance to use it, so I'm putting it up for sale.

(From the HP below) *There is also a video on how to use it.

Mixing Ink Kit Retail Price: 3,300 yen

Dye Ink
Product Number: HU-0101
Capacity: 10ml x 7, Diluent 10ml x 1, Empty Bottles x 2, Simple Dropper x 1, Instruction Manual x 1
Application: For writing with fountain pens, brushes, etc.

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hue = hue

hue 6COLORS is a mixing method devised by Seiichiro Takahashi, the representative of Kyoto Kusakizome Research Institute, using 6 primary colors. It's a method that allows anyone to easily express colors, even without knowledge of color mixing.
Instead of the three primary colors of red, blue, and yellow, it uses six primary colors, each leaning towards the other two colors: reddish blue (Rb), yellowish red (Ry), reddish blue (Br), yellowish blue (By), reddish yellow (Yr), and bluish yellow (Yb).
This allows anyone to easily express subtle nuances of color. Furthermore, by mixing the high-saturation primary colors with N (neutral), a color with extremely low saturation, it covers even muted color tones.
This methodology makes use of the know-how of color mixing artisans in Kyoto.

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Official HP → https://store.tagstationery.jp/collections/hue-6-colors?srsltid=AfmBOoqySg7wFGkDFSIXUhmyTfZXRAXQ2ru8BuwdnabEPenxgC3rAIX2

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*Unused, but has been opened once.