Generally, the purpose of publishing stamps can be differentiate onto four kinds :
Definitive Stamps
Most of publishing stamps aims to sufficient mailing cost everyday, it isn't related with one event or moment. Selling and using periods is unlimited, it depends on State Regulation. Usually about 5 years.
Celebration Stamps
Publishing Celebration Stamps is connected with an event, which is held nationally or internationally.
Special Stamps
International and national activities must be know by every citizens. One of way to make attention, by publishing stamps.
Charity Stamps
The Charity Stamps isn't sold by nominal price. Every piece of stamp has been printed with addition price, which would be contribute to charity agent.
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