flocking
n.β Β«Many Holga owners overcome this by taping up the gaps, or even spraypainting the cameraβs shiny interior matt black to minimise internal reflectionβa process called “flocking.” Others incorporate the light leaks into their work.Β» ββThe cult of Holga: The sixtiesβ camera makes a comeback” by Simon Usborne Independent (United Kingdom) Mar. 18, 2008. (source: Double-Tongued Dictionary)