Yes, you are right. Our Expert Calligraphy paper is raw Xuan paper which is not sized or processed with alum at all. However, it does show this ’semi-cooked‘ effects. The effects is realized by our special combination of raw materials and the special way to process them. Because the ’semi-cooked‘ paper in fact functions best for calligraphy art works, we recommend this paper for calligraphy purposes. Since it is not processed with alum, please mount it the same way as you mount other art works done on raw xuan paper. Yes, please use the normal flour/ alum mounting paste. You can make very find mounting paste at home. We would also suggest you to do a bit testing if you are not sure. 🙂