Coloured school chalks
A box of 6 coloured, conical - tapering from end to tip - cast school chalks, with an anti dust coating. Anton Franz Mörtel founded his chalk factory in 1870, but it was in the 1920's that the smooth stone free dustless chalk was introduced, which the still family owned company consider to this day their masterpiece. This coloured version has a high loading of high quality, and non-toxic pigments.
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