When doing new limited series, it is usual to generate some printing tests to measure the behaviour of the image with different finish papers or in several sizes. They are called “Artist proofs”.
These prints are outside the numbering of the limited edition, and it is normal that the artist keeps them.
You can see me in the pic next to Jesus Rocandio, from La Casa de la Imagen. A great professional that helped me a lot with gliclée reproduction process.
I tell you all this and many more secrets of the process, in the latest post of my blog: pakocampo.com/giclee-prints-step-by-step/