The following hints, tips and techniques can aid you in your efforts in designing your own tatting patterns or altering existing patterns to suit your special needs.
Most tatted edgings can be used on material with a sloping curve without any alterations. However, using an edging around sharp corners usually means altering the pattern to accommodate the extra distance around the corner point.
One of the easiest methods to visualize how a straight edging pattern needs to be altered to allow for turn around a corner is to use a straight-edged mirror.
A small, straight-edging mirror works well for this design tip. You can find these mirrors in many craft stores. Try to find the type of mirror that is not mounted in a frame and has no edging, frosting or beveling around it. You need to get the mirror edge flat against the pattern to get an accurate reflection. Just be careful of any sharp or exposed edge on the mirror.