After successfully completing his apprenticeship (lasted for 12 years) in an important and picturesque parisian gallery in 1995, Christian Collin joined a bookseller friend in 1996 and gain expertise and experience through significant participation in numerous annual art exibitions of prints and antique dealers both in France and abroad. He opened his first Gallery in 2001, rue Jean Ferrandi Paris VI. Since 2005, he has had his own business and set up in rue Rameau in the second district of Paris, but still continues to exhibit in some international print fairs like The Grand Palais in Paris.
For his clients, amateurs or professionnals, occasional buyers or demanding collectors, Christian Collin attaches great importance in picking out all that catches the eye, intrigues, possessing an aesthetic quality or an historical importance. He takes pleasure in developing an unusual eclectic taste, coulped with curiosity.
Since 2015, he has been collaborating with Justine Rouillé, a graduate of the École du Louvre in printmaking, and author of a dissertation on the publishing house La Galerie des Peintres-Graveurs, formerly run by Edmond Frapier. Her research contributed to the exhibition "Un chef d'oeuvre dans ton salon !, Edmond Frapier ou les estampes de grands maîtres à portée de tous" which took place at the Musée d'art et d'histoire de Saint-Denis in 2017.
Since 2018, Christian Collin has been President of the Chambre Syndicale de l'Estampe, du Dessin et du Tableau, the CSEDT.