Just about every type of paper available has been used to print postage stamps. In some cases, the specific type makes a big difference in the printing process as well as the value.
Due to the insufficient amount of gold coin paper money was used instead. In the Confederacy also Postage stamps were used as paper money.
No.
Unissued postage stamps would be hard to catalog, as they were never made available to the public. If you meant unused postage stamps, all the catalogs will provide pricing guidelines for used and mint stamps.
Sure, anything that protects the stamps themselves will work. Moisture, light, being handled incorrectly and dirt, dust, etc. can cause damage. The easiest way to preserve your stamps is with a stamp album or plastic sandwich type baggies
They are still valid for use as postage as long as they add up to the proper postage. If you check USPS regulations Postage due, special delivery and certified mail stamps are NOT valid as payment for postage.
A book of stamps to be used for postage is called a booklet. A book used to hold a stamp collection is called an album. One used to identify and value stamps is called a catalog.
No - Us stamps can only used on mail sent from the US.
NVI stamps, or "Non-Machinable Vending Indicator" stamps, are a type of postage stamp used in the United States Postal Service (USPS) that indicate a prepaid postage for a specific mail service. They are particularly designed for non-machinable items, such as letters with unusual shapes or thicknesses that cannot be processed by automated machines. These stamps reflect the current postage rate for first-class mail and can be used on envelopes and packages that meet the criteria. NVI stamps are convenient for consumers, as they eliminate the need to calculate postage for future mailings.
Florida does not have stamps. The Federal Government issues postage stamps, not the individual states. They can be used anywhere in the United States.
You can try selling them on ebay
Forever stamps have the value of the current First Class Postage Rate. Currently they cost 49 cents. They can be used 'forever' to mail one ounce of US Postage.
For a self-adhesive stamp, no it should not be removed. Mint means it is still capable of being used for postage.