Postcard used to "blow up" to large

Our First Mural from 1991. 10 pieces of Photographic paper which when viewed close up just consisted of black & white dots! Images laid on floor then the Apprentice climbed a ladder in the Hatton Gallery to get as far from image as possible, directing the paperhanger where the images had to overlap then be marked up prior to hanging. Still hanging after 25 years!