When applying a glue size to a fibreboard (MDF) panel, does the strength of the glue need to be stronger than the quantity of glue mix used in gesso? I have been advised by my supplier to use a stronger formula for the inital sizing (1:10) but I haven’t found this advice anywhere else.
The only rationale that i can see for that advice is either to providve a thicker size layer, or more likely, to minimize the amount of water applied to the panel. It does not seem really necessary to vary the proportion in either scenario. The first could be better accomplished by additional layers and the second would only very slightly reduce the water component. There are reasons to use different strengths of glue for different purposes, but I do not think that this situation calls for it.
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