A comparative study of the postal issues of the USSR and the participating countries Interkosmos was a Soviet international space programme that allowed the Warsaw Pact countries, later the other members of Comecon and further states, to take part in space mis...

Why the postage stamp and artificial intelligence have more in common than it seems. A postage stamp is a small picture bound by very strict rules. It is almost always rectangular, and it always carries an inscription, a price and a year. Those very rules are ...

Every young philatelist needs their own first set of tools to start a collection properly and with confidence. This is not an expensive set and does not require special equipment — a few basic items are enough to help you handle stamps carefully, arrange them ...

Once a young philatelist already has their first stamps, one of the most enjoyable moments arrives — arranging the collection. This process turns individual stamps into a real philatelic story. Arranging is not just putting things in order; it is a way to show...

When a young collector starts gathering stamps, one of the first distinctions to learn is the one between mint and used stamps. This is a basic concept in philately, and it determines both how a stamp should be stored and its value. Understanding these categor...

Storing stamps properly is one of the most important steps for every young philatelist. Even the most beautiful and interesting stamp can be damaged if it is not handled with care. That is why it is good to learn, right from the start, how to handle stamps so ...

One of the most enjoyable parts of philately is searching for new stamps. For young collectors this can be a real adventure, and the best part is that it does not require spending a lot of money. There are many affordable ways to start your collection and grad...

One of the most exciting steps for every young philatelist is choosing a theme. This is the moment when a collection begins to gain character, style and personality. A theme is not just a group of stamps — it is a reflection of the collector's interests, dream...

Every young collector starts with one small piece of paper that carries far more history than it seems at first glance. A postage stamp is not just a mark of paid postal service — it is a miniature work of art, a document of its time, and part of the cultural ...

The study of early Bulgarian postal issues from the 19th century represents a key element of modern philatelic expertise. The present research was conducted at the Central Research Laboratory (CRL) of the “University of Chemical Technology and Metallurgy” and ...