Blokland has authored a number of typefaces, the most notable being the influential Proforma and its sibling Productus. Proforma, an oldstyle-serif typeface, started out as a commissioned typeface for Danish digital typesetting company Purup Electronics.
FontShop International, while creating its
100 best typefaces of all time list described it as "groundbreaking at the time for the way that it combined economy of space with good readability". The impact of the Proforma design was such that in 1988 Petr received the infrequently-awarded
Prix Charles Peignot for distinguished typographic achievement by a designer under 35. The companion sans-serif typeface, Productus, was published by Font Bureau in 2000. ==References==