Good points Jim,Like all of us who have been framing for too long, I have seen some strange framing methods by others. One time a framer thought it necessary to glue the glass and frame together with superglue. Another had the glass and framing package jouned with cellotape. The FATG recommends the use of kraft papertape that is gummed for conservation and museum-level. This may be so, but kraftpaper is acidic, so does not really make sense. It is more a tradition overthere to seal the back with kraft papertape. The use of this tape also introduces moisture to the inside of the framing package, which in my opinion is not a good idea. Self adhesive brown tape is cheaper, quicker to apply and does not last very long. I have seen pictures framed five years ago with this tape, that starts to peel off at the corners. Gummed tape lasts a lot longer and even sticks to waxed frames such as the old oak ones, whereas self adhesive tape does not. When it comes to kraft tape, I use a small tray filled half with distilled water and a blob of PVA glue mixed in. I tear off four pieces of the tape longer than required. Run the tape thru the bath submerged and let it drip on the floor for a short while. The tape will start to curl and I place it on the back. After smoothing out all four strips, I cut off the ends with a knife while the tape is still wet. It is possible to wait until the tape is dry and the cut off, or cut the strips carefully to the required length before with scissors. If you cut when dry, then it will have stuck to the back of the frame, making it difficult to come off. Scraping and sandpapering will then have to be carried out, which is time-consuming.If I have my own frameshop in the future I ill not carry plastic and aluminum moldings, but at the moment I have to work with them. With plastic frames it is necessary to sandpaper the back of the frames before applying the gummed tape, otherwise it will not hold. Metal frames you cannot tape and are dusttraps. Insects can easily enter the framing package.My preferred method is to use a piece of two ply board and glue to the back of the frame with