FIXING CANVAS OF PICTURE CANVAS
Deformations and the degree of deformation of the canvas can be very different, they depend both on the technology of the material and on the reasons that caused one or another of its changes.
BACKGROUND CANVAS PICTURES HAPPEN:
From changes in the atmosphere in the room and from a sharp change in temperature and humidity.
From mechanical influences on the painting canvas.
MOST FREQUENTLY MEET THE FOLLOWING TYPES OF BROTHER:
sagging of the web, expressed in sagging
assembly in corners in diagonal directions, etc.
These defects mainly arise from changes in temperature and humidity. They do not require immediate correction, because when the normal regime occurs, they can correct themselves.
Under the influence of high humidity, the canvas is moistened and weakened. Attenuation is expressed in various forms of warping and depends on the quality of the stretch of the picture and the uniformity of the applied soil and paints. If the canvas was pulled up during sagging, then when the previous atmospheric conditions arrived, it would stretch even more and cracks and tears could form. Correct this type of warping is necessary only after after a rather long time the defects themselves have not straightened out.
The sagging of the canvas is corrected by stretching it through the blades in the corners of the subframe. The blades are usually located two in each corner and one at each of the slats of the cross. It is necessary to knock lightly and carefully with a small hammer on the blades. When hitting the blades, you should not allow the hammer to touch and slide over the canvas, as this can damage the soil and the paint layer. With uniform sagging of the blade should be evenly knock out all the blades. If distortion is observed only in one corner, then blades are knocked out in the same corner of the subframe.
If the picture was unevenly stretched and corrugation formed at its sides, this cannot be eliminated by pulling with blades and a partial constriction of the canvas is required. In the place of the defect, we remove the staples or nails from the subframe, then we tighten the canvas with tongs with wide flat lips and again fix the canvas with nails or staples. Not always this defect can be corrected by the general constriction method. Then we remove the picture from the subframe, put it face down on a marble slab and use a lightly heated iron through a paper pad to iron the canvas in places of these folds. If this does not help, then slightly moisten the canvas and iron again. This procedure is only permissible if the paint layer is in good condition.
In paintings not stretched over the stretcher from long storage and improper handling, distortions can form. In such cases, we put the picture face up on a wooden table, then we stretch and fasten the canvas on this basis with brackets or nails. After that, we humidify the air in the room and leave a picture, we do this for several days. The canvas absorbs part of the moisture, the soil becomes more elastic and the canvas slowly straightens. From time to time we tighten the canvas and move the nails or paper clips. In the future, the picture is pulled onto a subframe with the help of forceps and distortion go away. In some cases, ironing may be required as described above.
Sometimes, from improper storage and deformation of the canvas by foreign objects, scars, depressions or bulges of the canvas in the form of bubbles occur, often accompanied by damage to the paint layer. These distortions are often reduced or eliminated from prolonged lying of the picture on an even plane in a free state. Proper canvas tension on the stretcher can also fix this. If the above methods do not give the desired effect, then proceed to ironing the warped places with an iron, according to the previously described method.
The warp from the sticker of the paper label on the back of the picture is eliminated as follows: without removing the picture from the stretcher, put it with the front side on a flat table (ideally, on a marble slab). We peel off the paper from the canvas, gently prying it with a knife and scraping off the glue remaining on the canvas with a knife. After removing the glue, we straighten the warped place by ironing it with an iron. If this does not help, then lightly moisturize and iron again.
The simplest and most effective method of removing a small bubble: the place of the bubble on the back of the picture stretched over the subframe is slightly moistened. The glue that is part of the soil absorbs moisture and softens, and when dried, it compresses and pulls together the stretched canvas. If this does not help, then we straighten the place with ironing.
Folds and bubbles are also from getting debris between the subframe and the canvas. In order not to remove the picture from the stretcher, you need to remove foreign objects with a thin wooden plate, then wrap a little cotton wool on this plate, moisten it and wipe this place.
By similar methods, it is possible to eliminate bubbles only when there is no lag of paint from the ground, cracks, screes, etc.