The collection, which launched in September into 100 stores, added a premium tier to Bonmarché's price architecture.
Brand director Mark Tesseyman said the 60-piece collection would be introduced to a further 50 stores by March next year. "When David himself makes an appearance in a store to promote the range as part of his roadshow, we see double-digit like-for-like growth in sales," he said.
Tesseyman added that another David Emanuel roadshow is on the cards for spring 08, with 35 store visits in two weeks penciled in.
The collection is available in sizes 10 to 22 and prices range from £18 for a blouse to £35 for a dress.
Separately Bonmarché raised £20,000 for Macmillan Cancer Care last month during a 1920's inspired ball held at The Waldorf in London.