Second, on the back of a single block of glass mosaic should be jagged or stepped groove, so that paving will be more secure.

Third, the use of adhesives in addition to ensure adhesive strength, but also easy to wipe off from the glass mosaic, the use of adhesives can damage the backing paper or to color glass mosaic.

Fourth, under natural light, height of about 40 cm from the mosaic of its visually for cracks, defects and lack of edge, chipping phenomenon.

Fifth, random glass mosaic composed of nine Union square, flat on the lit area at a distance of 1.5 meters even at visually whether its luster, if uneven gloss in wet toilet overall fade easily undermine the appearance of the wall.