Milk pen

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A milk pen (also called a butter pen ) is a pen for writing on a slate . Outwardly, it resembles a pencil with a white lead or a white colored pencil . Its white mine is surrounded by wood.

Before the Second World War, milk pens were significantly more expensive than slate pens and were therefore a luxury product for schoolchildren from richer families. The advantage of the milk pen, however, was not only that it wrote more gently on the board, but also that it was easier to sharpen. Also, unlike a slate pen, the slate was not scratched when you wrote on it.

From the 1950s milk pens prevailed over slate pens because the cost factor no longer played the decisive role.