Yes, of course examination of differences, but it is not you .... to the same experts are dishonest people ...

Well just in the ultraviolet and infrared radiation I was a little swim :)
but with the signatures would like to understand in more detail ...

Suddenly statement, one might even say brave ...
But that's wrong.

so who is still able on the submitted signatures rolls to conduct a master class ?:)

And what a mistake, I'm no expert, I can make a mistake here ...

Dear vyadem! I believe that the attribution of paintings to be seen the full range of signs supplies (I will not enumerate). Guided only by the signatures - oshibka.Podpis easier to fake than zhivopis.Esli it rests only in the sign-it should be compared with samples of signature of the alleged avtora.No .. . necessarily at work, to coincide napisaniya.Vse it requires some time and if the seller starts to get nervous - he should go himself to the world beyond.
At contract signing papers were placed immediately after the writing - of paint mixed up and disturb the structure of the stroke on the picturesque poverhnosti.Inogda signature was made the other side of the brush on the picturesque layer (the test). This is the simplest sluchai.Chasto artist signed after several years of writing - is the worst case. There must be knowledge of the characteristics of handwriting avtora.Mozhet help and analysis of paint pigments to canvas and signature.
In each case has its own nuances and should be a podhod.Universalnyh advice here, alas, no.

Walk on the forum, the liquidation of illiteracy rates of signatures is samoobman.Kazhdy artist in a certain period of his life to sign and "dry", and "wet" colorful sloyu.Pervaya half of the 19, almost all put "dry", the third chertvert 19 th century and there are also such takie.Poslednyaya quarter of the 19, mainly on the "wet", the exclusion of only academic painting and its posledovateli.Kak only the era of relief paintings, fast, and went on the technology of writing in an academic manner, placed only on raw.
Signatures of the artists can be marked "dry" and lie on the varnish, and can "hang".
All this is necessary to look first hand, have a database of signatures of the artist and the comparative material on the periods of creativity.
Vasily Surikov to sign only "dry" and, moreover, to polish.
All that is needed to see.

Sharing experience - not to teach the courses likbeza.Ne against such an approach? "Judging by your post - no!

Dear Vyadem, my opinion that the signature on the original film (set by the author), the letters are written with the push for the paint layer, got into a thick paint layer, and therefore clearly shows the signature is on nedosohshemu colorful layer.

I am very grateful to all for the answers ... even though the issue was one of the area "for beginners", but learned a lot of new information!
Totally agree with you VYACHESLAV, at the expense of
must of course first of all start with stylistic analysis and finish, if necessary, x-rays, etc. (all depends on work).