I had produced an A3 calendar on glossy photographic, because I thought it would help produce depth in the images. It did. Great! BUT this calendar hangs in the kitchen (as a reminder of holiday destinations....) above a radiator, and it just curled badly. So much so, that it was impossible to view because of reflections, etc. SO, I reproduced it in photographic lustre, which has been fine - doesn't have the depth of colour, but a least it stays flat in the same location. I did let Bob Books know about this - there was no way that I anticipated or expected the gloss calendar to curl. I got an acknowledgement but it's been an expensive calendar overall.