In between 1970 and 1972, IBC launched its color transmission system named "Vinta Color" named after the vintas from Zamboanga, becoming the third network in the Philippines to convert to all-color broadcasts, after ABS-CBN and KBS. In September 1972, then-President Ferdinand Marcos declared martial law at the entire country, resulting IBC and other television networks (except KBS which was owned by Roberto Benedicto) were forced to shut down by the government. However, a few months later, IBC allowed by the government to return on the air.