Oil painting is the painting mixed with oil and the powder of pigment, which is painted on the basic surface of linen, board or board. Due to the oxidation of oil, the oil paint is completely dry. The paint after drying is bright, firm and has a quality and tangible.
Generally think oil painting is firm and solid not bad, actually otherwise, the passage of time,Great Big Canvas the change of temperature and humidity, the attachment of dust, the invasion
of insects, etc., in more than ten years of time enough to damage the oil painting.
Identification before repair
First, a detailed inspection is made before the restoration of the work. The inspection process can be divided into four aspects:
1. Textual research of works
Understand the author and the creation time, look for relevant information and painting characteristics about the painter, such as the commonly used material, color, brush stroke, creation style, creation idea and aesthetic point of
This kind of investigation can help the restorer establish a deeper understanding with the work, Large Abstract Painting on Canvas and master the original creation face of the work more accurately when
Ii. State evaluation
Firstly, it is necessary to determine whether the painting technique is oil painting or glue painting, record the size of the work, the theme, the signature of the painter, the date of completion, the storage condition of the inner frame
and outer frame, etc., and then conduct in-depth analysis after recording these basic conditions.
A. Substrate: the materials used to distinguish the substrate are flax, jute, hemp, cotton cloth, mixed fiber, board or fiber board;
The method of fixation is to use a nail or a nail for a gun;
Whether there is damage, oxidation corrosion, dampness mildew, microorganism or insect damage;
If it has been repaired by predecessors, what is the way of repairing and the adhesive applied?
B. Substrate “coating” : understand the color of the substrate “coating”, and whether the substrate has the phenomena of separation, floating, cracking, flaking or microbial invasion.
C. painting layer: analysis of adhesive used in pigments;
The thickness and thickness of the painted layer;
Tonal it is to belong to bright color, gray or dark tonal;
The color technique used is transparent painting or opaque painting;
Fine or rough strokes;
Whether the painting layer is cracked, locally or comprehensively,Large Canvas Art how deep the crack is, and whether it begins to spalling;
Whether the surface of the color layer appears blisters and so on.
The degree of these factors is evaluated and analyzed.
D. Protective layer: whether there is a protective layer, which is comprehensive or partial, times of application and thickness.
Carefully distinguish between transparent color and the color of the vannis layer whether there are lesions or microbial infestation.
Iii. Laboratory diagnosis
A. Ultraviolet irradiation: ultraviolet irradiation can penetrate into the interior of the protective layer and painting layer. When this kind of ultraviolet light is irradiated on the surface layer of the work, it will show blue-violet
B. infrared ray: its radiation principle is like the radiation of X-ray, but its radiation function is not as strong as that of X-ray. However, its perspective range is far beyond the ultraviolet radiation, and it can reach the coating
base and sketch layer of substrate, so it can provide the restorer with quite correct information.
Take photos and file
Before and after the restoration of the art works, both of them have the feeling of being different from each other. Therefore, before the restoration, it is necessary to take photos for archiving, as a witness for later comparison.
In addition, in the process of restoration, the original picture of the work is often needed as a supplement to master the color and composition of the whole work.
The key points of photography include the complete front, back, inner and outer frames of the works, and then the macro lens is applied to take pictures of partial close-ups in a segmented way.