On the nails used to stretch a canvas
 

Considering the "expensive" paintings in the collection of my friend, I saw that the center is a breakthrough of the paint layer and ground (and in part of the canvas), which at first glance be mistaken for craquelure. I am interested in the causes that could lead to this result. I began to examine the nails, which must withstand a load! What was my surprise when they pulled out with no effort! And the painting dates from the first quarter of the 20th century. Cap on the outside was rusty. Itself was a nail straight from the tin. Canvas not overtighten. I began to check the paint ... It does not dry out for 80 years!
Here is a story with a simple nail ....
Of course it all started with doubts about the authorship.

The conclusion arises from the whole story. Buy a good (expensive) modern paintings made by professionals. There are problems with the authorship will not, and safety will be better. Pavel Tretyakov started collecting contemporary art gallery in similar circumstances. By purchasing a replica on Sukharevskiy area, and issued for the old masters. Show off your purchase in front of artist friends learned that the work written by their counterparts.

Dear Valerit, if you can not distinguish between an old painting of a remake, not pulling out nails from the stretcher, then you really better take advice kozhinart and buy contemporary art.

Toinen Well why do you both attack, the man shared his experience to me like it was interesting to read this message, and you always see a fake, always, always, 100%??
Of course, after such comments, who wants to write in the forum! As the saying goes, do not try and be tolerant.

I think if we talk about tolerance, the very submission of the communication must first be different. And so the message poluchaetsya that friend who bought the painting from the story deadline, and filed it is not very tolerant of error buddy. Istria could describe a little differently. In other colors. Ask the professionals opinions first, and so in my opinion a message aggressive filed, the findings have been made in advance. :shy:

I have not felt that the tone, intent, or something else had at least some negative.
Thank you for your interesting story.
and write more, I wonder what originally was the reason to doubt the authorship?

Art went through above-average level of European auction. Expensive. Visible in ultraviolet light traces of "restoration." The signature was not sharply hit in the UV. Paintings by this artist practically does not occur (not to compare with). He is a graph of the highest level. For an artist, this painting was not of high quality, which was strange, but there are elements of his graphic works. In signing the letter "galloping" that absolutely does not match his, and this is serious, and raised doubts about that.
Well then, this was not a serious wrought nail, which looked externally quite well!
Incidentally, restoration and painting brushed the early 20 th century under the fresh paint often looks like from the late 20 th century.

And to illustrate?
As the saying goes: better to see once than hear a hundred times.

LIKELY You're talking about nails "Tex" (Four-CARNATIONS with a sufficiently large caps RECTANGULAR ......)
 And the oil can be mild for many years and even more ... if it is "crude" because it can not cure a very long time ..

Added after 2 minutes
Judging by your description - it's completely normal ... especially for the first half of the 20th

I still have photos of breakthroughs on the canvas, nails and traces of the nails on a stretcher.

Nail completely fresh from the other side



How did these breakthroughs on the canvas, even if the paint does not dry out?


And for 80 years, even whitewash dry out!

Oil paintings are preparing for years ....
if you do not take a regular "cooking" it dries out very long ...
I assure you.

Added after 4 minutes
breakthroughs could be and at the time of leaf ... from excessively diligence stretch canvas.
:)

more photos
 

but forgot to wear out one nail

In topic: I remember that during my training in OGHU, said that the best nails for this purpose, copper or brass.


But now, in the course of iron parenthesis.
(Copper is not met, interestingly, is it?)

There are copper plated (clad).
A copper material itself is very soft and thin brackets from it will be deformed.

Brass nails are - yellow.

Posted 12 minutes
Oleg Nazarov, as you said, it is not clear. Vegetable oils are divided into drying, and malosohnuschie nesohnuschie. In painting, usually used linseed and (or) poppy oil - drying nezhelteyuschie. Due to the nature of the polymerization of linseed is considered most appropriate, it erased the industrial way paint. Paint from a tube already contains linseed oil.
That is, if someone from the original to write in sunflower (and there are such people) - it would actually be mixed with linseed and drying all the same to be fast enough. Of course, you can overwrite their own pigments to non-drying oil, so the picture does not dry out, but it's, like, why?
 Drying times are also directly dependent on temperature, and the pigments used. THEOREM some pigments to dry very slowly. In a mixture of whitewash all dries faster. Accelerate the drying temperature can be a show-now put to the battery or dried over a gas stove is when you have to, "Well, very urgently."
Usually a drying-up of detachment, a few days-week. Until the moment when the picture can put something - a month. Until the moment when we can beat them with lacquer or a year.
 Coat of paint is still at the same time remains flexible. Loses its flexibility, as I understand it, a century coat of paint.
The oil is prepared over the years is when people buy raw, non-polymerized and polymerized oil and freeze it yourself, hang out in a bottle out the window for a year or so. Then poured into the upper transparent layer. In store for artists already polymerized linseed oil-EM did not have to cook for years. It is worth it, of course, expensive.