Artist/
Potter

Motohara
Reico

Artist/Potter

Motohara Reico

workshop

2010ー

ワークショップ「まほうのえんぴつ」

2010年8月4日
参加者:15名(小学高学年)
本原が黒鉛と粘土を7:3(HBの濃さ)で混ぜて焼いた「まほうのえんぴつ」を使い、子どもたちが絵を描いた。
黒鉛は450年前にイギリス人によって発見され、木に挟んだり、布で巻いて文字や図を描くものとして使われた。200年前には黒鉛の塊がなくなってしまったため、残った粉を粘土とまぜて焼き固め鉛筆の芯をつくったのが鉛筆の始まり。子どもたちは細い線が描けるよう鉛筆石を割ったり、真っ黒に塗り潰して消しゴムで描くなど工夫して、思い思いの手法で絵を描いた。
協力:株式会社中越黒鉛工業所(大阪市住之江)

Graphite pencils were created before 1565, when graphite deposits were discovered near Sheathweight Gray Knots in Cumbria, England. Locals, traditional farmers, found graphite very useful for marking sheep. After the graphite lumps were gone, Jacques Conté found a way to mix the remaining graphite powder with clay, shape the mixture into rods, and fire it in a kiln. The hardness of the graphite rod can be changed by changing the ratio of graphite to clay.

[Pencil stone, 2010]
I made a pencil stone of graphite and clay in the same ratio as the hardness of an HB pencil = Graphite: Clay = 7: 3.

[work shop ”magic pencil” for age 10~12 yrs old, 2010 August]
I had the children draw using a pencil stone; some broke stones to draw sharp lines or covered the paper in graphite then used an eraser to draw. The kids started complaining, “My hands are completely black! Pencils are easier.”