Since its invention. holography has been mostly applied at visible wavelengths in a variety of applications. Specifically. non-destructive testing of manufactured objects was a driver for developing holographic methods and all related ones based on the speckle pattern recording. https://www.roneverhart.com/Necco-Mighty-Malts-Speckled-Malted-Milk-Eggs-Wrapped-9-Ounce-Bag/