thegoodfellas/blogset-br huggingface dataset:
seen with regret during my travels that most liners neglect the proportions and depart from the process employed in Paris (then thought to be the centre of excellence for picture restoring) by artisans more justly famous in this branch. These last, in place of lining the pictures on their own stretchers by means of very hot irons, always do it, so far as their size will permit, on false stretchers, in such a manner that they can work them from two sides; and they supply the place of the great heat used by the others, by use of heavier irons (generally a 15 lb weighted iron was used), longer continual labour, and more frequent renewal of paper. They do not spare any exertion either, to obtain a paste and a ground size that shall be perfect, and a fine canvas without knots, thus every picture coming out of their hands united like a mirror, and always remains so. In a later note he says, Their workshops present an imposing aspect from the immense tables, the pulleys, the smoothing irons of all weights and sizes, and the other implements, which announce at the first glance a substantial establishment, and inspire ones confidence. He goes on to praise the qualities of Monsieur Foucque, one of the liners for the Musee de Paris, that I owe him the return of making this public acknowledgment of his talents. The pictures that come out of his hands are so united like glass, without any vestiges of old creases, or marks of the facing paper, which is renewed four or five times if there be occasion. In place of burning the colours, as so many others do, he employs irons with so little heat, that he is obliged to supply the place of heat by using them of much greater weight, and by applying more labour. De Burtin goes on to say that the two major causes for bad lining are the over heating of the irons or the bad quality of the composition for fixing the old canvases to the new. A most certain occasion for failure in lining he says, results from the size used being too strong, or from the mixture of other ingredients which attract moisture which, especially in Winter, attract mould..... Lastly from the use of certain mixtures for this purpose liable to be affectected by variations in the atmosphere, he recommends, a composition which Monssieur Fontaine of Paris has prepared. The composition is made by taking any given quantity of jelly (cold size) made from parchment, sheeps skin, or other skins, by boiling, to which add an equal quantity of water, and a fourth part of the same quantity of rye meal. The whole is heated, and used warm. The jelly or size made from the skins is the same as that used by gilders, except that it ought to be only half as strong. The consistency should be that when cold the jelly will support vertical a spoon placed in it. Here are two recipes given: Venice Turpentine....1 lb White resin.............0.5
lb 1 stone of flour........ adding thinned glue to give consistency 2 quarts of paste 0.5 pint of made glue 0.5 do Venice Turpentine 2 tablespoons of boiled linseed oil 1 table spoon of Paris White. The editor of the 1845, English edition of Burtins treatise makes the following note, The following two recipes for size are, it is believed, used by some of the best London liners, for fixing pictures on new canvas. Fielding, writing in 1847 in London, had no hesitation in advising that paintings should be lined. In almost all cases, if the picture has not already been lined, it would be best that this should be done before any other operation takes place; and it is so much better performed by those that make it their business, that we recommend none that have the opportunity of getting it done in London, or other places where there are persons accustomed to its management. He then goes on to recommend a method which, in our eues, would only result in extreme distortion and produce an adhesive which would be extremely difficult to remove. This is very typical of linings of this period. Take the old picture from the stretcher frame and lay it on a perfectly flat surface, as a table, or a large drawing board, something larger than the picture, the front of the picture upwards; lay on the surface of the picture a sheet of paper covered with thin paste, particular if the picture is broken in the paint, or has holes in it. Afterwards take some thin glue size, and with it make a paste of wheat flour; this by some is used moderately warm; others prefer it cold, and at least one day old; perhaps the former would be considered the best. The picture is made something less than the new stretcher frame on which it will have to be placed when ready, by cutting a little of its edge; and the canvas or unbleached cloth, which is to constitute the lining, must be so much larger than the picture as to leave a sufficient quantity to admit it being nailed on to the new stretching frame. The picture now must be laid on the table, or level board, front downwards, the table or board having previously been made a little damp with a sponge; this will make it adhere to the table in some measure; but if it be wished that the picture be immoveable, as in the process of transferring from an old cloth to a new one, described here in another place, the best mode is to have the paper that is attached to the front of the picture something larger than the picture, so that the edges may be made fast to the table with glue or paste. The back of the picture is next to be covered with paste, of a very strong copal varnish, or with a cement, or a kind of glue, made from a good cheese that has been well pounded in a mortar, and then washed with
warm water to carry off the most soluble part of it. The substance which is left can only be dissolved if beaten up with lime water, to a paste again in a mortar, to which it is added gradually, until it become sufficiently diluted for use. But wich ever of the above may be used, it must be well brushed into the back of the picture, and the lining well pressed down on to it, by pressing the hand down on it in every direction. The outer edges of the lining, are to be nailed to the table with a great number of small tacks, so drawing the canvas as tight as possible in every way; afterwards a piece of wood, with a rounded edge, is passed over the lining with a tolerable hard pressure, to perfect the adhesion of the picture. The glue made from cheese is said to have valuable property of being, when dry; perfectly incensible to any wet or moisture. When the lining is so far dried, that the paste or glue, which has penetrated through, will not stick to the iron, it is to be passed all over with a heated iron, moderately hot, and the greatest care must be taken that the hand does not stop for an instant, or the mark of the iron will be so impressed on the painting that nothing will obliterate it. The picture is now ready to be nailed on to a new stretching frame. The combination of washed cheese solids and lime water produced an irreversible casein glue of a traditional type. At the same time it was introduced into the manufacture of commercial painting grounds, which in turn led into the embrittlement of many of the paintings of this period. Crisis in Venice The following of the Venetian oil technique in the 16th and 17th centuries when the confidence in the capabilities of the method encouraged the painting and production of massive ceiling pieces and the painting of a size far beyond the physical capabilities of the support, this period can be used by us as a useful landmark in the sequence of deterioration which I have called the lining cycle. Glues and grounds of the type described by Vasari in 1550 have only got a period of limited life. Consolidation of the paint layers by impregnation with glue would only produce factors which would cause in time further deformation. The impregnation techniques that were used up to 1670, when lining at last came into common practice might have strengthened the paint layers and consolidated the canvas, but would have done little to prevent the subsequent mechanical breakdown which would come in the form of tears and the falling away of the canvas from the top stretchers. A reasonable estimate of the period of time required for this kind of weakness would be anything between 100 to 150 tears would be the outside limit before a picture would have to receive either strip lining or attention for structural weakness. Thus, if we look at the period of Venetian
history from the beginning to the end of the 18th century, we will find an historical landmark of immense importance in the history of conservation. I will now take my descriptions of these events from extracts from an original manuscript by Signore Giovanni Okelly Edwards of Venice, 1833, The author of this manuscript was the only son of Signore Pietro Edwards, who practised restoration in Venice under the ventian republic and subsequently under the Austrian government. He died in 1821 at the age of 76. In a paper entitled, On the Restoration of the Royal Paintings under the Ventian Government he refers to the number of reports on the poor condition of the paintings between 1725 and 1775, no less than 751 reports were prepared at this time. All mentioned the decay of the pictures and earnestly called the attention of the public to the urgent necessity of repairing the greater part of them. A report prepared for the Society of Painters in 1727 showed the number of paintings requiring restoration at that time amounted to 20. It was, however, thought Signor Edwards, very fortunate that the Government should have acted with great circumspection until the year 1777 in consenting to the general and universal restoration of all the royal paintings, because the art of repairing paintings damaged by the time had not then attained perfection. By the 1770s the situation had changed radically and in the years to follow, hundreds of paintings received restoration treatment. Signor Edwards lists 41 paintings by Jacomo Tintoretto, 11 by Bassani, and a few of Titian; in all 405 pictures were restored between the years 1779 and 1785 under the direction of the Venetian Senate, who entrusted the undertaking of this general restoration of the President of the College of Painters. These pictures were contained in 32 public buildings in the district of St Marks and the Rialto, after which 270 more were restored between the last mentioned period and the year 1788 under the direction of the same person, making a total of 675 public paintings restored out of 1187. The pictures were divided into classes and the sums of money for the restoration were based on square footage. The pictures of first class that were restored, computed by the Italian square feet, comprised an area of 6,458 sq ft and 26 inches, of the second class 6,407 sq ft and 5 inches in total in square feet 12,865 and 31 inches. 26 artists acting as restorers were retained in public service during this period of restoration, and they worked under a Royal Inspector of Pictorial Restorations and continued to work in Venice until 1779, in restoring 82 further pictures under the Austrian Government. This restoration continued, and when Mrs Merrifield met Edwards in 1833, she had an opportunity of seeing one of the canvases by Paulo Veronese which had been removed from the ceiling. Had an opportunity of closely examining one of these works which had been removed from the ceiling for the purpose of being repaired. The picture had been lined, but much
of it had absolutely decayed and there were large blanks on the new canvas. The ground of the picture was extremely thin, and was not visible; the paintings were much worn in places and some if it had scaled off. When Mrs Merrifield was visiting Venice and was going through the papers of Signor Pietro Edwards, Director of Restorations, she came across one contract for the restoration of a picture by Signore Floriani. The painting in question was the Assumption of the Virgin by Titian, formally in the church of the Friary, and now in the Academia. The date of this document ascertained that the paste used for the lining the picture was composed of flour paste, Flanders glue and Ox gall, the use of the later ingredient was to preserve the paste from the attack by insects. The method of pressing freshly lined pictures pursued by Signore Edwards differed from that practised in this country(England). The process was described to me by his son. It was as follows: The face of the picture being secured by pasting paper over it, it was laid on the polished Venetian floor, or, as it is called terrazzo and the lining was fixed to it. Hot sand was then laid all over it, beginning always in the middle of the picture, whence the sand gradually spread to the edge, and the picture was covered to a certain height. By this means, the air was pressed out from between the canvas and the picture, and an equal degree of warmth and pressure was communicated at the same time to the whole surface, much more safely and effectively than with a hot iron. Glue has continued to be used as a consolidant for flaking paint from the 17th century to the present day, when it is an everyday occurance in many Italian and Russian studios. In Il restauratore dei Dipinti, published in Milan 1866, Signore G Secco Suardo describes a colletta for consolidating the painting. This is recipe No.8. Take 12 parts the glue in transparent flakes, which is improperly called Colla di Pesce (fish glue) while it is only a strong glue of the most refined sort, which is used in cooking for gelatine, and dissolve it in 12 parts of water. Put in 4 parts of molasses, mixing it with hot water, as much as necessary to reduce it to the necessary fluidity, which varies according to the case, but on the average it can be of the consistency of milk, but if instead you want to keep it, you should add one part of good white vinegar, then, in a glazed earthenware, very spread out, keep it in a milk warmth so that it can evaporate without fear of burning and condense like a vischio (mistletoe. sticky !) He goes on to say, Monsieur Merimee teaches that animal glue will tolerate an eight of oil, but does not announce how to add the oil to the glue would be that when there is little water in it. Hence, having just obtained the colletta, as
indicated in recipe No. 8, unite with it a little at a time, nut oil in the proportion of one part to eight of glue, weighing it before it is melted, mixing it very carefully so that the two substances are perfectly incorporated. For his lining mixture, Secco Suardo uses heavier glue. This recipe is No.12. Take flour of linseed, one part, put it in a casserole and unite it in the usual way with 24 parts of water, put in also two parts of strong glue, and boil it for half an hour. Take it from the fire; put it in a vessel three parts of corn flour and the same of rye flour, put into it a little at a time, the mixture in the casserole, manipulating it qith a spatula, so that it is well mixed, then pass it through a sieve, pressing it. Throw the remains from the sieve, away, place that which passes through into the casserole, and that on the fire, and stirring constantly bring it to the boil; and when it is well cooked, that is to say, when it has boiled for a few minutes, take it off, for the glue is made, except that, before it cools, put in it also one part of molasses, so that it remains sufficiently elastic. It is very useful and I recommend it. Glue mixtures of the type here described by Secco Suardo are still used today. That has the advantage of being glues of low cohesion strength which limit the stress exerted on the painting canvas, and which make the eventual removal of the lining canvas comparatively easy. The ever-increasing rate of decay of pictures in the late 18th and early 19th centuries, is reflected in the rise of the number of restorations recorded, and in the wave of interest shown in lining and transfer techniques. The attention of the art world was gripped by the amazing technical feats of transfer carried out in France by Hacquin and Picault. Although almost all of these methods were based on the use of animal glues and casein, and on marouflage using pigment/oil cements, the first experiments with wax, both for lining and blister laying, had been carried out in the mid 18th century. But the earliest record of wax as a firmly established lining adhesive is not until 1858, when it was in use by Carbonelle of Brussels for this purpose. A detailed account of this period in the history of restoration may be found in Marijnissen Origins and development of the Use of Wax. Much of the enthusiasm for the use of wax impregnation springs from the work of Count Caylus, who devised a new method of painting in encaustic pictures by first applying paint, onto to a canvas that had first been coated with beeswax. On completion, the painting was heated in front of a fire, and the wax was allowed to penetrate into the unlocked colours. The burst of interest in this unusual method might well have waned had it not been for an enthusiastic
painter, Mr. Muntz, who carried out a series of exhaustive experiments, using the Caylus principle proving the value of wax as a protective coating and consolidate. Mr. Muntz carried out his first tests in 1757, and in 1760 he gave a description of the results of his experiments. I had all the colours used in oil painting carefully ground with water at Mr. Sandys colour merchant, and from these colours, I composed 90 various tints of each a two ounce galley pot full, tempered with water, I left them well screened from dust to dry, divided each into four equal parts; two of each set by for comparative use, the other two used as follows One part tempered with water, the other with the finest nut oil according to custom, each painted over a space of 6 x 2. The encaustic ones brought to the fire as instructed, each piece of cloth cut into five equal parts . One of each in the open air, exposed to sun, dew, wind and rain.One of each nailed to wall of cellar.One of each nailed to kitchen ceiling, near chimney, with fire all year.One of each nailed to living room.One of each between several quires of paper, in close drawer without air. Left them all for 27 months, then tempered remaining tints with water and nut oil, and prepared fresh cloths with the colours. His detailed tests on the canvases led him to several conclusions. Encaustic colours, having resisted the injuries of the weather better than oil for 27 months, they will be more lasting for longer times... Having resisted corrosives, alkali, aqua fortis etc. the circumbient air, however impregnated with saline particles, cannot affect them.... If pictures of this kind are damaged, fire will restore them. He then carried out an investigation on oil colours painted on waxed grounds and biterely came to the conclusion that ground is more the cause of the colours changing than the colours themselves, perhaps owing to the desiccated saline particles of the oil, which are dissolved and mix with the new oil and colours; or to the super abundant quality of salts contained in the ground or priming, which is generally composed of the coarsest oil and colours, frequently half chalk. By 1796, much finesse had been brought to this method, and combinations of the use of solid beeswax or beeswax mixed with turpentine were used in the preparation of not only encaustic painting but special kinds of crayon drawings. Here is the wax impregnation method as described in the Hand-maid of the Arts, published in London in 1796. The picture deemed finished and the colours dry, prepare a clear coal fire, and set the picture with the painted side towards it, at about 2 distance from the fire. Let it grow warm, and then by degrees bring it closer to the fire, till it be 1 distant, but never advance it nearer. The picture may be held perpenticularly, or a little inclined, as may be found most convenient, and when it is too large to receive the
effect of the heat at once, first one part and then the other, may be brought parallel to the fire at the distance prescribed. When no further change seems to be made in the picture, but the whole surface is shining and the colours rendered darker and fuller in an equal degree, it may be concluded that the wax be sufficiently melted, and duly absorbed by the colours, the picture must then be removed from the fire in the same gradual manner it is made to approach it, and kept from any rude touch until the wax be entirely set and grown hard. If there be found any defective parts where the wax has not undergone the due degree of heat required in melt it, such parts must be perfected by bringing a red hot poker, or any other such metallic body near them. And if there still appear any spots where, after duly melting the wax to commix it with the colours, a deficiency must be supplied by rubbing the proper quantity on the back and melting it by any means of a hot poker or other proper implement of metal in the manner. The whole technique sounds so modern in principle, that apart from the crude methods of heating, it is hard to realise that this method of impregnation was carried out of 200 years ago. We still face the same problems of even impregnation and the treatment of small areas which are starved of wax. Muntz later pursued the possibility of using wax in conjunction with the normal oil technique, and carried out experiments with oil paint on wax impregnated canvas, the wax layer serving both as a moisture barrier and as a material which would stop the rapid absorption of the oil paint. It may have been these techniques that led the American painter, Charles Wilson Peale, 1741-1827 to experiment in wax impregnation. Dr. Wolters reported in 1960 that one of Charles Wilson Peales pictures, painted in 1780, was still in very good condition. Muntz came to clearly recognise the value of wax as the consolidating material. He recognised it as a protective layer which would provide a moisture barrier. He also explored the possibility of wax impregnated canvas as being an attractive material to paint on with conventional oil paints. But at no point did he propose that wax should be used as an impregnating material for existing paintings in distemper or in oil paint and, recognising the greatest danger that attends the wax impregnation principle, (that is the change of tone of the colour on infusion where that of the original paint may be drastically altered), he designed a colour regulator which would allow the artist to anticipate the colour change and darkening of paint layers when the painting had been finally impregnated. The wax impregnation method is very common in countries of the Western world. Thousands of paintings have been lined or impregnated by the use of wax or wax resin mixtures. Not all of the paintings treated have fared well. In some cases, the