Artist Proof - Definition:

When an artist is checking the colour and quality of the limited edition he will receive proofs. Traditionally, Artist's Proofs, remained the property of the artist. In modern times they are sold at the same time as the Limited Edition Prints. Artist's Proofs are exactly the same in terms of how they are printed, the colours, quality of printing, paper etc. Artists number them, often with Roman numerals and with the mark A/P. Artists sign them too, exactly the same as with the limited editions. There are not as many artists proofs released however. Normally only 10-15% of the limited edition run is released as Artist's Proofs.