21. He worked in etching, line and stipple engraving, as well as aquatint . 22. The first 14, in etching and aquatint , are dated 8 January 1937. 23. Till 1948 ninety of these aquatints were exhibited in Keukenhof Castle, but sold. 24. Some of his drawings were published in aquatint . 25. In 1988 Matt started his own publishing company Spilled Inc . producing aquatint lithographs. 26. During this time, Bishop began working in various printing techniques, most notably aquatint . 27. Each plate was accompanied by descriptive text with a dedication and a vignette in aquatint . 28. In the mid-1950s he experimented with lithographic techniques such as woodcut and aquatint . 29. He worked in a variety of media, especially stipple, contour etching and aquatint . 30. Like etching, aquatint uses the application of a mordant to etch into the metal plate.
