A tree resin used in over-glaze recipes to augment the recipes adhesiveness without altering its formula and thus desired effects. Few over-glazes, when applied to already matured (i.e., non-absorbing, glassy) surface, will stick uniformly while drying and heating up, resulting in flaking, peeling, curling and the likes before reaching their melting/fusing points. Arabic Gum, as with CMC, can be mixed with the glaze slurry or painted directly onto the already glazed surface to be second-glazed (i.e.,
over-glazed). To prepare the gum, dissolve 50 grams per liter of water, let sit until totally dissolved, heat to a slow boil until it reaches the viscosity desired, then either paint directly onto piece or mix slowly, while stirring, into the glaze slurry in portions of 25 cm3 of gum to each liter of glaze slurry. To save prepared gum solutions, add 2% straight formol (formoline) an industrial dilution of formaldehyde.
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