The silver sunbeam : a practical and theoretical text-book on sun drawing and photographic printing (1873)
Towler, John, 1811-1889 · New York : E. & H.T. Anthony · leaf 596
the paper with ammo- nia, care should be taken to have the whole surface equally acted upon, other- wise lines and streaks will occur, owing to the unequal action of the ammonia. 5. The Silver Bath becomes Discolored. — The solution is either acid or not sufficiently strong. 6. Tears of Solution… … with the print before toning. Yellow stains on the surface, varying in size, come from acid bubbles beneath the print in the fixing bath. To avoid this, fix prints face upward. The handling or touching the surface of the paper Fig. 48. with sweaty or wet fingers will cause stains. Black spots in…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
