優質「正」印是一個品質認證計劃，讓消費者能根據這標誌，分辨出特定的產品巳通過香港標準及檢定中心測試，符合相關的本地及國際標準。產品取得優質「正」印之後，我們更會進行定期的抽樣測試及市場監察，確定該產品品質的穩定性。優質「正」印形象鮮明，讓消費者購物時能夠容易認出貼有優質「正」印標籤的產品，作出最佳的購物選擇，同時亦可保證該產品的性能及品質達到一定水平。

“STC tested” Mark is a product quality certification mark. It helps consumers to identify, at a glance, that the product has been tested by Hong Kong Standards and Testing Centre to relevant local and international standards. To ensure it represents the best quality mark in the market, type testing and regular market surveillance are the key areas controlled by this scheme.The design of the “STC tested” Mark is perfectly identical, enabling consumers to make the best shopping choice by recognizing those products bearing the “STC tested” Mark.