Jens Ingvald Andresen var utlært hos gullsmedene Hjortdahl & Meldahl 1915 - 19 og fortsatte i firmaet til Bernhard Meldahl trakk seg ut i 1931.
Han fortsatte hos Bernhard Meldahl frem til 1936.
Samme året tok han svenneprøve og løste håndverksbrev.
Samtidig etablerte han eget sølv-emaljeverksted sammen med en kompanjong under navnet Andresen & Scheinpflug.
Verkstedet begynte i Vognmannsgt. 8, Oslo og senere i Storgt. 7.
Verkstedet opphørte i 1966.
Jens Ingvald Andresen was apprentice at the workshop to Hjortdahl & Meldahl from 1915 to 1919. He stayed with the firm until 1931 when Meldahl left to form his own company.
Andresen followed Meldahl and continued to work for him until 1936.
It was during 1936 that Andresen completed his journeyman's piece and was officially licensed. At this time he and a companion co-founded a separate silver enamel workshop and called it Andresen & Scheinpflug.
The workshop began life at Vognmannsgt. 8 in Oslo, but later moved to Storgt. 7.
The business was closed in 1966.
