ANTWERP, Belgium - The hallmark of luxury is exclusiveness and mystery, but Belgian fashion pioneer Bruno Pieters wants to break tradition and offer high-end buyers "transparent shopping from A to Z".

In 2012, he created "Honest by", a web-only fashion label that gives the shopper an intricately detailed breakdown of a product's elaborate supply chain that can circle the globe, even if Pieters favours the local.

In the regular world of fashion, "you can sell a 50,000 euro ($67,000) dress without being aware that the product was made by children," said Pieters.

"In the fashion world, few ask themselves the question."

But the question became a burning one after the catastrophic collapse of a garment factory in Bangladesh killed 1,100 people in April.

The disaster shocked consumers, putting the spotlight on the often appalling conditions for workers making garments and, activists hope, creating a desire in shoppers to consider every link in the worldwide supply chain.

At "Honest by", click on a piece of clothing, and a long list appears, itemising supplies and workmanship that made the shirt or suit possible, prices included.

The client "can verify the origin of materials, where the clothing is made and at what price," said Pieters, standing in his workshop in the heart of a hip neighbourhood in Antwerp, Belgium's main commercial hub and a major port.

Click on a green silk tunic and the shopper, comfortably surfing at home, sees not only where the fabric comes from, but the buttons, stitching and labels too.

All added up, the tunic costs 225.87 euros ($300) compared with a wholesale cost of 69.14 euros. The mark-up, clearly stated on the website, is the company's premium for creating the item.

"It no longer works that companies go produce in China and slap on a 'Made in France' label," Pieters said.

"Transparency will soon be inevitable for the luxury business because the only reason to pay the prices, is quality and know-how," he added.

Pieters, 38, is a refugee from high fashion. A former art director at Hugo Boss, he burned out in 2009, embittered by the drive for the bottom-line that he says rules the luxury goods industry.

But adorning the walls of his studio are the bright colours and tight angles more associated with Paris cat walks than fair trade shops.

"It's possible to be responsible and doing something other than linen and beige," said Pieters.

The designer took a two-year break from fashion before building his company and insists that despite a switch to vegetarianism, he is no activist.

"I'm just creating what I'd like to buy," he said.

"From my time in high fashion, I learned the power of consumers, whose every mood is closely scrutinised, analysed by hundreds of experts," he said.

"Fashion, which by definition leads the crowd, is a good means to change things."

'Honest by,' whose name is a play on the honest buyer, was approached by the International Labour Organization, looking for tie-ups in a campaign against child labour.

But "Honest by" is not a large-scale business, producing about 1,500 pieces since its launch, expanding only by inviting young creators to also sell on the site.

Pieters says that 20 percent of the profits made in designer collaborations will got to charity, but the company overall does not yet turn a profit.

The designer refuses to give sales figures, however.

Transparency in business "means publishing earnings, but that is of no interest, except to shareholders."