Serigraphs are also known as silk screen prints. A fabric consisting of a strong fiber with relatively open weave is stretched taut on a rectangular frame. The drawing may be made directly on the screen with a greasy, oil-based ink called tusche; this is then covered in a water-soluble glue; the glue will not adhere to the tusche and when the tusche is removed with a solvent open areas of fabric are left that are not "stopped" by the glue. Carl used this method initially, but soon found ways of applying the glue by hand, essentially working in negative, and producing a variety of effects that resemble lithography, pastels, and other art media.

(Commercial artists use a film to cover the screen rather than glue; openings in the film may be made by cutting areas out using a fine knife, like X-Acto or using photographic processes. This method has also been used by non-commercial artists, most notably Andy Warhol.)

In printing, the screen is fastened over a sheet of art paper and ink is forced through the open areas onto the paper by means of a rubber strip in a handle, called a squeegee for obvious reasons. Multiple layers of color may be applied by washing the screen and doing another layer.

These works were exhibited in private art galleries in Vancouver, Victoria, Tacoma, Portland; and as the missing numbers, especially in the early series attest, they were regularly sold.

Because there are so many works in this category, this page is a link to several others, organized by date.

• 1971
• 1972-73
• 1974-76
• 1977-84