TVB International will tonight stage the Hong Kong launch of its Mandarin Super Channel service to Taiwan in a presentation to advertising agencies and potential clients. The system, which uses both satellite and cable distribution, is beamed via the Palapa B2P satellite to 109 cable head-end stations in Taiwan. It has been on air since September 28 without advertising except for three league baseball games, which attracted a 90 per cent advertising take-up. Super Channel broadcasts for 15 hours a day, twice re-editing an original five-hour segment. The commercial air-time is being limited to six minutes per hour, though this may increase to 10 minutes. Advertisements will be screened from next Monday. General manager Fung Shing-kwong will announce advertising rates of NT$15,000 (HK$4,350) per 10 second slot in the 6.30 pm to 11 pm prime time, and NT$9,000 at other times. He will also detail the penetration levels achieved to date, claimed to be 75 per cent - or 1.5 million homes out of a cabled total of two million. The two million cabled homes represent 45 per cent of all households with television sets in Taiwan. ''We see a huge potential for advertising revenue in Taiwan, and it is our goal to become fully established as a fourth channel, alongside the existing three broadcasters,'' Mr Fung said yesterday. Taiwan spends more than twice as much as Hong Kong on advertising, but television's share of the market is only about 30 per cent, whereas, in Hong Kong, it is almost 50 per cent. ''The territory's print media can't regionalise its advertising, but Taiwan's print media can, making more accurate targeting of audiences possible. In time, we also hope to be able to do this with our satellite/cable TV service,'' Mr Fung said. ''We are the first in the region to use a digitally compressed signal. This decision was made to reduce picture and sound-quality deterioration to the minimum - an important bonus for advertisers.'' Mr Fung said television's 30 per cent advertising share in Taiwan was worth NT$18 billion. He said TVBI's goal was to win about 15 per cent - NT$2.7 billion - of that market within 18 months. ''At present, we have firm commitments from advertisers amounting to NT$100 million,'' he said. Advertising revenue from Hong Kong was not expected to approach the level generated in Taiwan, but was expected to supplement it. Advertising packages - where buyers take one premium slot, during the news for example, and then get two or three fringe time slots at a discount - are not yet being offered. Assistant general manager Michael K. W. Chan said: ''The philosophy behind the channel was to offer a distinctive alternative to the three terrestrial channels, which have tended to compete directly with each other. ''Scheduling has been head-to-head, with little real choice on offer.'' Super Channel news, for example, will be screened at 7.30 pm, rather than 7 pm, to take account of Taipei's notorious evening traffic jams. It will be anchored by a local woman but will emphasise international news that affects greater China - Taiwan, Hong Kong and the mainland. Taiwanese content stood about 40 per cent and the rest was from Hong Kong, but a clear objective was to reverse this imbalance, Mr Fung said. The channel's ace in the hole was access to the world's largest TV film archive, TVB's 75,000 hours of Chinese-language programming.