After leaving the National Academy of Art shortly before graduation, Kanchev took part in exhibitions and biennales in Bulgaria and abroad over the next 22 years, including
Belgrade,
Budapest,
Berlin,
Moscow,
Warsaw,
Brno,
Ljubljana and
New York City. During this time, individual exhibitions of his work were organized in Sofia, Moscow,
Prague, Berlin, Warsaw and Budapest, among other cities. In 1967 when he was 52, Kanchev participated in an
AIGA (American Institute of Graphic Arts) international exhibition in which he presented 23 of his logos, including his Petrol AD trademark. Fifteen years later, in 1982,
Japanese magazine
Idea ran a 16-page feature on Kanchev and his work. At the age of 79 in 1994 he was named among the world's top ten trademark artists along with
Paul Rand and
Saul Bass. Kanchev died on 22 August 2001. In June 2009, the premier Sofia Design Week featured an exhibition dedicated to Kanchev's logos. ==Themes and styles==