Application and purpose: By placing a balance card in the scene to be photographed, oriented at a defined angle relative to the direction of the incident light, and taking a reading from it with a reflected light meter, the photographer can be assured of consistent exposures across their photographs. Two sided gray panel: The white balance reference card has a grey side for exposure correction and a white side for white balance setting. Gray cards can be used for incamera white balance or postprocessing white balance. Durability and wearability: Wearable and washable, and antideformation, very durable. Portable and convenient: Balance card collapses to just 1/3 of its full size, allowing it to fit in carry bags and be carried around easily. An essential part of the digital photography process for photographers or hobbyists. Usage scenario: This handy double sided pop up 18% grey/white card simplifies the complex technical issues surrounding exposure and color correction when working in different lighting conditions. It provides a major benefit when working under pressure at events such as weddings or fashion shows. Practical applications (23 scenarios): Weddings and fashion shows, where quick, consistent exposure and accurate white balance are critical in changing lighting. Studio portrait sessions, to maintain consistent lighting and color across multiple poses and setups. Onlocation shoots with varying ambient light, to simplify exposure control and color correction in postprocessing.