Traditional Delft decorative pottery, vases with engraved decors and sgrafitto technics glaze. First the Fles produced printed/transfer pottery. In 1891 development of  Lecomte’s Berbas-ceramics, (primitive looking) pottery with multicoloured glaze and metallic gloss decoration, inspired at the Oriental and in 1897 (Senf & Lecomte) the Jacoba-pottery, partial glazed with abstract, floral and figurative (like dutch scenes) engraved decorations. This pottery is composed of different kinds of home/domestic clay. Porceleyne Fles items most sold in the United States.

Around 1880 paintings of old masters, like Rembrandt, Vermeer, Franz Hals were painted on pottery, also Mauve, Israëls, Roelofs, first in water-colour. They stopped with reproducing if the original painter or familymembers of the deceased had objections. Crisis pottery was made during World War II, small and sober collection of Delft ware. Moralizing plates between World War I and II. In the beginning of the 20th century first porcelain biscuit with engraved decors on a white background, filled with gold or multicolour porcelain-silt also sectile and relief panels. 'Nieuw (New) Delfts' earthenware with Persian influence goes back to the past, in contrast with Berbas-,Jacoba and porcelain-biscuit pottery which had an urge to renewal  Commemorative plates, lustre pottery and construction earthenware. Green-and Black-Delft, Cleopatra and Red-crackling decors are much more popular after WOII than New/Nieuw-Delfts.

Between 1956 - 1978 the Fles had an" Experimental Department", where only unica/singles pieces were made.  In the sixties realised this pottery factory a tile-scenery for Karel Appel in Cobra-colours: red, green, blue and yellow.

L.E.F. Bodart, A. Le Comte, J.W. Gidding, C.A. Lion Cachet, H.W. Mauser, E.H.M. Molkenboer, G.J.D. Offermans, W.D. Oosterloo, L.J. Senf, C. Hartog, J. Jansen, J.A. Burghoorn, J.Th. Dessens, J. Gidding, J.H. teixeira de Mattos, J.T. Toorop.