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photo crayon
photo crayon adj. 
/ˌfəʊtə(ʊ) ˈkreɪən/, /ˌfoʊdoʊ ˈkreɪən/ now rare designating or produced by a process in which a photograph is produced on glass and backed with a white sheet which has been marked so as to give the effect that the picture has been drawn in crayon, or in which a photographic groundwork is covered in crayon to give the same effect.
Brit. /ˌfəʊtə(ʊ) ˈkreɪɒn/
, /ˌfəʊtə(ʊ) ˈkreɪɒn//ˌfəʊtə(ʊ) ˈkreɪən/U.S. /ˌfoʊdoʊ ˈkreɪˌɑn/
, /ˌfoʊdoʊ ˈkreɪˌɑn//ˌfoʊdoʊ ˈkreɪən/ΘΚΠ
society > leisure > the arts > visual arts > photography > photographic processes > [adjective] > colouring of photographs
photo crayon1865
1865 Times 2 May 16/6 (advt.) L. Caldesi and Co. respectfully invite the nobility and gentry to view their new photo-crayon portraits.
1892 W. E. Woodbury Encycl. Photogr. 503 Photo Crayon Process, a photographic transparency on glass..[was] afterwards backed up with white paper, on which a number of lines, hatchings, or stippling were lithographed, giving the portrait the appearance of a crayon work.
1915 Staffordshire Sentinel 29 Jan. 1/2 (advt.) If you have only a very inferior portrait a Splendid Likeness can be obtained in the New Photo Crayon Process.
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