100 Vouwblaadjes

Vouwblaadjes (“folding leaves”) is the Dutch term for sheets of colored paper that typically come in square format of 10×10 cm. They are used for handicrafts like origami, by kindergarten and school kids as well as by older knutselaars.

This package of 100 assorted sheets is undated, but the fonts in use tell us it must be from after 1932: that’s when Energos, the bold script typeface, was first cast.

Introva was a publisher of children’s books, games and toys active (at least) between the 1940s and 1960s. The company also did business as Introva Fröbel: it distributed products associated with Fröbel’s educational ideas. According to Wikipedia, Fröbel influenced modern origami:

When Japan opened its borders in the 1860s, as part of a modernization strategy, they imported Fröbel’s Kindergarten system—and with it, German ideas about paperfolding. This included the ban on cuts, and the starting shape of a bicolored square. These ideas, and some of the European folding repertoire, were integrated into the Japanese tradition.

The sans is Nobel (1929), here used in two weights. The bold caps mix glyphs with blunt and pointed apexes, compare A and M vs. N. The latter forms were available on request only.