Introduced by European teachers, art enthusiasts, artists and patrons, printmaking has been adopted by many of Africa's finest contemporary artists, including Bruce Onabrakpeya, Cyprian Shilakoe, Mohammad Omer Khalil and Twins Seven-Seven. The reasons for its prevalence are historical, social and practical. Printmaking requires great precision, steadiness of hand, patience and skill. While teachers chose printmaking as a means of emphasizing the benefits of practical training, the process soon flourished into a more vibrant practice in the hands of Africa's artists. Because of its low production cost, portability and ability to be disseminated widely, African artists have used printmaking effectively to express a post-colonial identity, comment on political and social ills and ensure greater visibility for their work.