Help identify the author of the picture
 

In a picture caption Copin, found only Russian artist Kopin 18-19 age, but the picture is likely to French ... helped establish the author's paintings.

Maybe this one?


http://sovcom.ru/index.php?category=...r&painter=2165

dedulya37, there is not the technology, and the Russian painter would not podpsyvatsya Copin (I think )....

Maybe it's - "Cop in".
Ie
copy with someone

Another question ....
Have the technology determine the time of the painting.
Tell me please: how to do it, what solutions are applied.

This is done in specialized expert institutions.

A home opportunities such examination, if necessary acid to get it??

Acids?
There's no acid, in fact, required, as a serious instrument.
:)

I myself would not give up this solution, which kapnul - and dating in your pocket.
But seriously, this is a very delicate matter - dating painting, because set of pigments in 18 th century France and the first half of 1919 will be approximately the same, and the connection is likely to be, natural oil (linseed, poppy, nut, etc.).
On the degree of polymerization of colors, too difficult to separate the 200 years from 250.
If this is a copy, it is easier to take pictures in the infrared spectrum and check authenticity figure.

KatrinKOZ, combine the sulfuric acid with hydrochloric and nitric acid.

Then dip into this solution now.

Effect it will be stunning!