Similar in appearance to the rimless letter but to add strength a groove is routed for the return to sit in the face; adding extra strength.
Rim Faced built up letters are the standard manufacturing method for acrylic faced letters when illuminating with LED. This type of built up letter has the most strength.
Rimless letters allow for the full face of the letter to be illuminated and are the perfect option for small-medium sized letters.
Essentially the opposite of a flat faced letter as the face of the letter has a sunken effect. The face of the letter is open and has a solid back which is the letter of choice for creating a retro design with LED bulbs embedded into the face.
The standard look for a built up letter with a solid face.