The difference between a Giclee and a regular print is basically the method of production and the materials used.
Not all prints are Giclee prints, even when created with an inkjet printer.
There are certain criteria that a print needs to meet to be considered a Giclee.
First of all, the inkjet printer must use a set of 12 pigment-based inks. Traditional printers use a combination of 4 inks: Cyan, Magenta, Yellow, and Black (K) – also known as CMYK.
Pigment-based inks are more enduring than regular inks and achieve a wider color gamut and smoother gradient transitions. That’s why Giclee prints look so vibrant and rich.
Next, Giclee papers must be archival quality. That means the photographic paper or canvas must be acid-free, with a pH value of 7.0 or higher.
This is very important because any acid in the paper will mix with the inks, making them fade and grow dull. The very best art printing papers consist of cotton rag or wood cellulose, or a combination of the two.
To learn more about the different papers, check out the Best Paper For Printing Digital Art.