In principle, the immorality of passing off dud antiques is utterly clear. In practice however the view from the saleroom floor is not quite the same as from the pulpit. The best dealers, like the best collectors, are extremely knowledgeable, but anyone can be fooled — and most of us have been. There remains however a world of difference between making an honest mistake and deliberately perpetrating a deception. (from the Introduction to THE CONFIDENT COLLECTOR; see Bly 1986, p. 8)

When greed and antiques meet everybody ignors warnings. Jonathan Gash (in A RAG, A BONE AND A HANK OF HAIR)

… [T]here is quite a substantial amount of glass on the market that could deceive collectors. Charles Hajdamach (Glass, in Bly 1986, pp. 80-103)

Deceive … Deception … The reader should note the occurrence of these words in the definitions of fake and forgery that are given in the files that follow because deception is all too commonly encountered when one purchases antique and collectible glassware. With the rise in popularity of the Internet, the number of deceptive glass articles can only be expected to increase in the future. Although the potential purchaser is limited in his or her ability to inspect a proferred item prior to purchase, most Internet sellers offer some form of guarantee.

Several kinds of deceptive practices are used today; this folder concentrates on those that result in fakes and forgeries, together with reproductions that are sometimes misrepresented in the marketplace.