Question to experienced people
 

Several years ago, when the question arose about the time of writing a work (according to the seller, the work was more than 30 years), an artist friend of mine advised me very carefully, in the invisible part of the regular sewing needle poked pasty place of painting. If the paint is soft - that work has been written recently, if the firm as a rock, then over time. Interested in your opinion, is valid whether such "express - analysis" under the following conditions:
1. Painting technique allows a manipulation
2. Do you have permission from the owner, or there are conditions to do so.
3.Proyavlenie maximum caution in relation to work. (Although this in itself is an axiom)
4.Nu and understand that this does not negate all the standard procedures to verify the authenticity of what you have set.

And so, this raises the question to the experts: If the work is "washed" and varnish - old painting softens? What is the technology of cleaning dust and dirt that inevitably leads to a softening of oil paint?

FAIv, this method really is, and although he was slightly barbaric, known for a long time as a sufficiently effective means of "rapid test" time napisaniya.Delo that complete drying of oil paints is approximately 100let after writing a picture, ie it becomes "like a stone" and her needle had not protknesh.No and painting your age fairly firm, although there was a great role played by the connection if the job was diluted with linseed oil-based paint will be softer if turpentine or white spirit, firmly

Even if work and washed several times, the paint does not soften up plasticine state. Never, under any conditions!
A check with a needle, an old and proven method. Never fails!

1.Na picture must include the invoice, we determine for the most chassis places, the thicker layer of paint so it dries more slowly. 2.estestvenno-permit holder, a microscopic hole in the place of "spear" in any case remain. 3.eto be irresponsible place pictures on the edges, in the background. And finally, bathing paintings, as well as varnish coating does not affect fundamentally the state of painting (in terms of its softening point), although they may lead to the destruction of the paint layer, if you do not remove soap after bathing (usually use a baby) or will not cover the picture painted not compatible with an oil painting (or nitro-based PVA)

In no case !!!!. Not a soap or detergent sredstv.Vse to a greater or lesser extent contain alkali which makes the paint layer faded. And the water for washing soap penetrate through craquelure and lagoons to the ground can destroy it in the process of drying.
After a thorough examination of the paint layer and the canvas with a soft brush remove dust. Then a soft, slightly damp cloth in small patches can be wiped painting starting with pereferii.Vodu better take distilirovannuyu.Obrabotannye areas must be dried with paper towels, easily promakaya.Ne we should try to totally clean -- only the topmost layer. Next - the patina of time. The next stage - drawing on the painting surface a minimal amount of linseed oil, semi-dry brush followed by a slight promakivaniem paper towel if there is neobhodimost.Vse be done slowly and in line with the nature of the pictorial layer and the degree of pollution.
If painting requires more cleaning to do this is a proven professional with a fixation of all stages of the photo and obtaining the consent of the owner. The same is coated with varnish.

Vyacheslav, restoration usually to remove stubborn dirt (such as: ingrained dust, dirt on top of lacquer film) with фактурно painted pictures using weak solution of children's soap, natural soap after cleaning all the water should be removed, and by itself it should do a professional

Thanks to all who responded! So I understand correctly, that "wash" painting and coating it with varnish should not lead to a softening of the paint layer, the picture the first half of the 60's. Consequently, if the paint soft, it should be alerted?

Yes, certainly

Longest total dry white, a little more than 15 let.Kazhetsya so, if my memory serves me.
Other paint dries much faster. Therefore, the need to poke a needle in belilnye load.
To understand how hard layer to compare with the work perfectly in time, that is already well dated.
Then you'll understand the difference in sensations vtykivaniyu needles.

And if the work artificially old? I mean, stoves, lamps and so on.

Why not ask who did not show the work? Maybe there and "poke" is not necessary.
In general, council with a needle is not serious. If there ever was a fact of experience, then this kind of problem can be solved visually. And if not, then at least shut up still remain in doubt.

Although plenty bake in the oven, the paint is still so dry. And craquelure from the furnace is very different from the old normal cracelures.

[color="# 666686"]Added after 2 minutes[/color]
course I would like to see the work in question. But this deal with the owner.
And with a needle, the so-called eksperss method, we can say in field conditions.

FAIv,
As far as I know, an effective way. Time of occurrence cracelures (as a consequence of drying) about 40 years. First of all, it appears, under natural conditions, the paste-like belilnyh layers. Restoration and washing usually does not lead to a softening of the paste-like sites. Drying and artificial breaking of the picturesque layer is always visible. Cracelures does not appear in those places and different from the natural in its texture. That if znatocheskimi methods to detect. Chemistry, naturally defines more precisely.
And be careful, you first should try a thin layer in an inconspicuous place, if you try kovyrnut pasty layer on the old job or get a thick layer of varnish, it can cause serious damage to the work.

Well, there are still some things ... You can, of course, have their own doubts, but to take and zafakapit someone else's work? Who do you take me for?: Confused:: confused:: confused:

the degree of drying oils envy primarily from the oil (svyazueschego), the second of the pigment (some are sikativami pigment such as umber of promptness with lead whiting) ability to make some things I popadlis 20 30godov where they were pasty smear melkodispestnymi lands (such as volkonskoita) since oil was soft after 80 years! and vice versa, I saw the paste-like paintings that crackled through the 15 years after writing .... the most reliable way to determine the time of job now is isotopic analysis!