Over time, there are some problems on lamp shade. Fortunately, it is very easy to repair lamp shade.
Use a soft brush attachment to vacuum the lamp shade to remove all dust and dirt. Check the part of the bulb that has been degummed. If the side seams run from the top to the bottom of the shade, you can open the seam up to the point where it sticks.
Pour a small amount of white glue onto a paper plate, and moisten the paintbrush. Along the edge of the fabric or paper, brush 1/4 inch. Usually, you can follow the line of the former glue to brush it. Paint the underside of the other part of the shade. Next, press these two sections together. Hold the two materials together until the glue dries by using a bull clamp at the rim wire closest to the repair.
If the old tape has become damaged, stained or is no longer in good shape, remove it around the top or bottom ring of a shade and cut where the damage starts.
Use a measuring tape and scissors to measure and cut contrasting color 1/2-inch bias ribbon to fit around the ring. Add 1/2 inch for overlap. Apply both sides of any remaining tape to the lamp shade. Place the bias tape over the tape on the lamp. Fold bias tape in half. During the process of glue dries, hold the tape in place every inch or two with clothespins.
If you cannot find bias tape in the color you want, you can try grosgrain ribbon. At the lamp shade seam, you can begin to use your ribbon and lap the end by 1/4 inch. It is recommended to use enough glue and clothespins to stick it well.
Cut a small amount of onionskin paper the size and shape of the tear to repair a torn. At the location of the tear, you can pain the inside of the shade and position the onionskin over the glue. To make the tear become less visible, you are supposed to paint another coat of glue over the top of the onion skin.