Inlay mats allow two colours to be used in a mount with only a single thickness of mount board. Double and triple mounts produce a similar effect but, where glass is used, may unacceptably increase the distance between the print and glass. In the case of non-glare glass this can be a particular problem because there is a tendency for colours to soften at the air gap increases beyond a single thickness of mount board.
Contrasting colours produce the best result but are absolutely unforgiving of the smallest inaccuracy. It is therefore very important to work accurately when using the inlay technique. Designs can be further enhanced by combining the V-groove technique with the inlay method. Parallel V-grooves can be used to define at both sides of the inlay area, or a single V-groove can be added to the centre of the inlay.