Gauze sticks to the board before applying the substrate. Its role is to strengthen the substrate of cracking that may occur during the time, especially at gesso, because that kind of substrate is vulnerable to cracking than acrylic. It is wrong to think that gauze can protect substrate from cracking caused by drying and shrinkage of board. This force is so strong that the cotton gauze can not stop it. Gauze protect the substrate from cracking caused by other factors.
There is also the opinion that cotton gauze is used for better adhesion between substrate and board. Many iconographers put gauze on icons today because it is so done in the Middle Ages, not knowing the purpose of setting the gauze. Some iconographers today, especially when applied acrylic surface, do not put gauze, considering it superfluous.
Stick gauze with synthetic glue
Gauze may be stick skin glue, when placed gesso, or synthetic white glue for wood when placed acrylic surfaces. If it is stick with synthetic glue, gauze need to be cut to the appropriate size to be slightly wider than the board, and soak in the diluted glue to the density of yogurt. When the gauze absorb the glue, it should stretch across the board and aligned by hand. Then brush should be taken and if it is necessary spread more glue over the gauze and board. When completely dry, cut out parts of gauze which are spread outside the board, with a knife or a scalpel.
Stick gauze with skin glue
If you stick with skin glue, glue is needed to prepare-dissolved in water as described in the article "Substrate“. This dissolved glue must be more diluted in water, so we will add the water in relation to: diluted glue 1 part, added water half a part. Gauze drown in heatedly glue and still work as you would with a synthetic adhesive glue, but that should be noted that the glue must always be warm.