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Glycerol ester of wood rosin (or gum rosin), also known as glyceryl abietate or ester gum, is an oil-soluble food additive (E number E445). The food-grade material is used in foods, beverages, and cosmetics to keep oils in suspension in water, [ 2 ] and its name may be shortened in the ingredient list as glycerol ester of rosin .
This type of rosin is typically called wood rosin. Colophony (rosin) from the maritime pine Because the turpentine and pine oil from destructive distillation "become somewhat contaminated with other distillation products", [ 18 ] solvent processes are commonly used.
If the relative humidity exceeds 60% for a sustained time there is a chance that mold can develop on the ivory. It will be a white and greenish fuzzy growth that will require particular care and cleaning. [9] Research has found that temperature does not have as great of an impact on the condition of ivory that relative humidity does. [8]
Acetone-Rosin Treatment is sometimes used on dense wood that cannot be penetrated by PEG. [13] This would include softwoods that are nonporous. The goal of this treatment is to replace cells of wood with natural rosin. Rosin is a natural resin that is produced within some woods, for example pines naturally produce resin and are considered a ...
A machine oil stain could also contain traces of metal, for example. [1] Also of concern is the color of the material that is stained. Some stain removal agents will not only dissolve the stain, but will dissolve the dye that is used to color the material.
Tall oil, also called liquid rosin or tallol, is a viscous yellow-black odorous liquid obtained as a by-product of the kraft process of wood pulp manufacture when pulping mainly coniferous trees. [ 1 ] [ 2 ] The name originated as an anglicization of the Swedish tallolja ('pine oil'). [ 3 ]
Checking: Slight gapping between wood cells that creates a checkerboard-like pattern. Found where wood is cut straight across the grain for carving, such as in a ball-and-claw foot. Dry rot: Decay of seasoned timber caused by fungi that consume the cellulose of wood, leaving a soft skeleton that is readily reduced to powder.
Strip linings strengthen the edges of the canvas so that they can withstand re-stretching. Both strip lining and patching are less invasive than lining. Another method used in place of lining is loose-lining. Loose-lining is accomplished by stretching a painted image over polyester sailcloth without adhesive between the fabrics. [2]