The Society of Lithographic Artists, Designers and Engravers (SLADE) was a British trade union representing workers in the printing industry.

[1] The United Society of Engravers merged into SLADE in 1972, which promptly formed a wallpaper and textiles section.

[2] In the 1970s, SLADE was one of several trade unions targeted for criticism by Conservative Party politicians and the right-wing press as part of their campaign against the closed shop.

SLADE was attacked for seeking to extend unionisation into new areas of the print origination sector where they were trying to recruit and to negotiate 'Union Membership Agreements' or 'Agency Agreements' (a type of 'pre-entry closed shop' where the trade union acts as a staff recruitment agency) with employers.

Such arrangements largely disappeared in the printing industry (and elsewhere) following anti-Union legislation passed by Margaret Thatcher's Conservative government in the 1980s and the successful assault on the print unions (after SLADE had merged with the NGA) led by Rupert Murdoch's News International Company in 1986.