Question: When were a large number of fake Salvador Dali paintings produced?
About the article "Salvador Dalí", section "Graphic arts".

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For two centuries after Vermeer's death, his works were appreciated by a number of connoisseurs in Holland—although attributed in many cases to better-known artists such as Metsu or Mieris—but were largely overlooked by art historians.
The Delft master's modern rediscovery began about 1860, when the German museum director Gustav Waagen saw "The Art of Painting" in the Czernin gallery in Vienna, and recognized as a Vermeer the work which was at that time attributed to Pieter de Hooch.
Research by Théophile Thoré-Bürger culminated in the publication in 1866 of his catalogue raisonné of Vermeer's works in the "Gazette des Beaux-Arts".
Thoré-Bürger's catalogue, which drew international attention to Vermeer, listed more than seventy works by Vermeer, including many he regarded as uncertain.
The accepted number of Vermeer's paintings today is thirty-four.
Upon the rediscovery of Vermeer's work, several prominent Dutch artists, including Simon Duiker, modelled their style on his work.
Other artists who were inspired by Vermeer include the Danish painter Wilhelm Hammershoi and the American Thomas Wilmer Dewing.
In the 20th century, Vermeer's admirers included Salvador Dalí, who painted his own version of "The Lacemaker" and pitted large copies of the original against a rhinoceros in some now-famous surrealist experiments.
Dali also immortalized the Dutch Master in "The Ghost of Vermeer of Delft Which Can Be Used As a Table", 1934.
Han van Meegeren was a 20th-century Dutch painter who worked in the classical tradition.
Motivated by a blend of aesthetic and financial reasons, van Meegeren became a master forger, creating and selling many new 'Vermeers' before being caught and tried. 
 Dalai Lama, religious leader usually spelled Dalai Lama Kingdom of Dali, (937-1253 AD), centered in modern Yunnan Kingdom of Nanzhao, Kingdom of Dali's predecessor state, also known as Dali at times Emperor Daizong of Tang's third and last regnal period (766–779) "Dali" (Dalida album), 1984 "Dali" (Ali Project album), 1994 Dali (fossil), the fossilized cranium of a premodern human found in Dali, Yunnan Dali (goddess), a goddess of hunting in Georgian mythology Espace Dalí, Salvador Dalí's permanent exhibition in France 2919 Dali, a main belt asteroid  
The Collection.
Lord Beaverbrook's collection.
The gallery opened with a collection of more than 300 paintings, mostly British, that had been assembled by Lord Beaverbrook.
Most of the works had been purchased by Beaverbrook himself, with the assistance of advisors including Sir Alec Martin, managing director of Christie's, W.G.
Constable, curator of the Boston Museum of Fine Arts, and Lady Dunn, the widow of the industrialist and art collector Sir James Dunn.
Lady Dunn became Lady Beaverbrook when the two were married in 1963, a year before his death.
In 1954, Lord Beaverbrook had set up the Beaverbrook U.K. Foundation, a charitable foundation one of whose objects was "the purchasing for or providing funds for the purchase by libraries museums or art galleries in the Province New Brunswick... of books manuscripts papers letters periodicals maps paintings prints statuary and other documents or works of art..." Beaverbrook gave the paintings he had already acquired to the Beaverbrook U.K. Foundation, and subsequent purchases of works for the Gallery were made by the Foundation.
According to contemporary news reports the total value of the collection was $2,100,000.
It included works by J. M. W. Turner, John Constable, Thomas Gainsborough, Joshua Reynolds, Edwin Henry Landseer and other 18th and 19th century British artists.
Beaverbrook had also acquired works by contemporary artists with whom he was personally acquainted, including Augustus John, William Orpen, and Graham Sutherland.
Acting on the advice of Le Roux Smith Le Roux, he bought several paintings from the 1955 "Daily Express" Young Artists Exhibition, which Le Roux had organized.
These included Lucian Freud's "Hotel Bedroom", which won second prize in the exhibition.
In addition to Lord Beaverbrook's own acquisitions, the Gallery had received two major donations of artworks before its opening.
Toronto businessman James Boylen donated 22 paintings by Cornelius Krieghoff.
Lady Dunn donated three portraits by Walter Sickert and three works by Salvador Dali.
Two of the Dali paintings were portraits of Lord and Lady Dunn, while the third was the very large painting "Santiago El Grande", which was on display in the central gallery when the Beaverbrook Art Gallery opened and has become closely identified with the Gallery.
This painting, which measures thirteen by ten feet, and represents Spain's patron saint James the Great on a white horse, had been created for the Spanish Pavilion at the 1958 Brussels World's Fair.  
The artist worked extensively in the graphic arts, producing many etchings and lithographs.
While his early work in printmaking is equal in quality to his important paintings, as he grew older he would sell the rights to images but not be involved in the print production itself.
In addition, a large number of fakes were produced in the 1980s and 1990s, thus further confusing the Dalí print market.
 The Village of Dali, a location in "Final Fantasy IX"