Chalky Versus Regular Paper German Stamps

I have a number of German stamps that I can't tell if they're chalky or not. In particular I have Scott 357 or 357a(chalky). I also have 356 which as far as I can tell is only chalky in the non overprint issues. I tested both with a .925 silver and neither left any spot. I don't understand since I assumed the 356 would be my chalk "control". I tried it with 2 different silver items.
I include an image of my 356 since it should only be chalky. I can provide 357 (?a) if needed. Thanks

I don't know German (nor English very well) and I use the site "austrianphilately.org" to translate philatelic terms from German.
In Michel this series is marked with "gestrichen" paper. I'm not sure that means "chalk surfaced" coated paper because also in Michel in other series I found the mention "gestrichenes Kreidepapier"
The existence of chalk on the surface of the paper I think works on MNH stamps.
I did a test on an MNH stamp with "gestrichenes Kreidepapier" and it works
The difference for 357 and 357a is the watermark.

@cupram.

You are quite correct in what you wrote.

Kreidepapier is chalky paper
gestrichenes Papier is coated paper, i.e., it does not necessarily have to be chalk-surfaced.

Thank you NSK and
Happy New Year

Un an nou fericit!

For chalky paper I've never cared for the silver test because it leaves a mark on the stamp. I've also found that for older stamps, and especially on those that have been postally used, judging by the relative glossiness of the surface is too unreliable. Instead I use a mini-microscope (readily available and affordable). Since the chalk is applied to the paper before printing, the ink does not sink into the fibers and the effect under magnification is usually obvious and striking: colored areas bright, with clear, sharp borders and little or no bleeding. Once you see a stamp on chalky paper under sufficient magnification (my little Leuchtturm model is 20-40x) you'll seldom have doubts about others.

PS In using Michel I've learned not to mistake "gestrichenes Papier" (=coated, whether or not with chalk) for "gestreiftes Papier" (=laid paper).

p0506img, If you do a search on "chalky" you will find numerous threads, all with helpful information. My experience with German stamps is that it is sometimes difficult to tell the difference on a used stamp. (Unused is quite easy). Yours is very used so is not a good control.

NSK,
Urarea traditionala este "La Multi Ani"
Esti vorbitor de limba romana?
George

Cupram,

No, I have visited Romania in 1980 when I was young. I returned for a two-week trip in the Ardeal: Cluj-Napoca, Alba Iulia, Turda, Sighisoara, Medias, Biertan, Sibiu, Brasov, Prejmer and Bran, and a little later Bucharest as stop-over on my way to Bulgaria. I always try to pick up a little of the language. But in this case, Google helped out.

There remain a couple of places on my to-visit list. I think few people know the beauty of Romania's historic towns. The food is good - mostly Italian restaurants -, the beer is cheap and the people are friendly.

NSK
Thank you for these beautiful words about my country.
There are cities on your list that I haven't visited.
The old monasteries in Moldova, several cities in the western part of country Arad, Timisoara, are famous and visited by tourists.
In 1980 (the communist period - with many shortcomings) for residents we could not find beer too easily and it was not very good compared to what is found today.

What catalog are you using that shows chalk paper varieties for these?